Term
| What is the energy of motion? |
|
Definition
|
|
Term
| What type of energy is an example of kinetic energy? |
|
Definition
|
|
Term
| What type of energy is possessed by objects because of their position or arrangement? |
|
Definition
|
|
Term
| What is the unit of energy? |
|
Definition
|
|
Term
| What is the definition of a calorie? |
|
Definition
| the amount of heat needed to raise the temperature of 1 gram of water up one degree Celsius. |
|
|
Term
| What is the SI unit of energy? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| What is the law of conservation of energy? |
|
Definition
| energy is neither created nor destroyed by any process |
|
|
Term
|
Definition
| the temperature at which the motion of the particles within the substance ceases, kinetic energy is zero. 0 degress K.. -273 degrees C |
|
|
Term
|
Definition
| anything that has mass and volume |
|
|
Term
| What is a solid state of matter? |
|
Definition
|
|
Term
| What is the liquid state of matter? |
|
Definition
| regular volume, irregular shape |
|
|
Term
| What is the gas state of matter? |
|
Definition
| irregular shape and volume |
|
|
Term
|
Definition
| change from one state of matter to another |
|
|
Term
| What has chemical properties and can undergo physical and chemical changes? |
|
Definition
|
|
Term
| What are physical properties? |
|
Definition
| characteristics that can be observed without altering the substance |
|
|
Term
| What are chemical properties? |
|
Definition
| characteristics that cannot be observed without altering the substance |
|
|
Term
| What is a physical change? |
|
Definition
| a change that doesn't change the substance |
|
|
Term
| What is a chemical change? |
|
Definition
| a change where a new substance is formed |
|
|
Term
| What is the conservation of matter? |
|
Definition
| matter cannot be created or destroyed in any process |
|
|
Term
| What did Antonie Lavoisier do? |
|
Definition
| conducted experiments to prove that the total mass of the substances in an experiment will not change |
|
|
Term
|
Definition
| a substance that cannot be separated into simpler substances by a chemical change |
|
|
Term
| What contains all known elements? |
|
Definition
|
|
Term
| T or F, elements are not pure substances? |
|
Definition
FALSE SUCKER!
Elements are pure substances |
|
|
Term
| What is a pure substance? |
|
Definition
| any substance that is made up of one kind of material with a unique set of chemical and physical properties |
|
|
Term
|
Definition
| two or more elements combined by a chemical reaction. They are also pure substances and can be separated. |
|
|
Term
|
Definition
| a blend of two or more pure substances |
|
|
Term
| What are homogeneous mixtures? |
|
Definition
| mixtures that are the same throughout, and has no visible different parts |
|
|
Term
| what are heterogeneous mixtures? |
|
Definition
| not the same throughout, has visible different parts |
|
|
Term
| Can mixtures be separated? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| What did Democritus propose? |
|
Definition
| that all matter is actually composed of tiny indivisible particles which he termed "atoms" |
|
|
Term
|
Definition
| the smallest particle of an element that retains the chemical identity of that element |
|
|
Term
| What did Lavoisier do in chapter 3? :D |
|
Definition
| he studied the conservation of matter |
|
|
Term
| What did the experiments of Lavoisier lead to? |
|
Definition
| Joseph Proust conducting experiments on the law of constant composition. |
|
|
Term
| What is the law of constant composition? |
|
Definition
| a given compound will always contain the same elements in the same proportion |
|
|
Term
| Who came up with the atomic theory? |
|
Definition
|
|
Term
| What are the postulates to the atomic theory? (4) |
|
Definition
1. Each element is composed of extremely small particles called atoms
2. All atoms of a given element are identical, but they differ from those of any other element.
3.Atoms are neither created nor destroyed in any chemical reaction
4.A given compound always has the same relative numbers and kinds of atoms |
|
|
Term
| What did Michael Faraday suggest/state? |
|
Definition
| that the structure of atoms was somehow related to electricity, and that atoms contain particles that have electrical charge. |
|
|
Term
| What did Ben Franklin do? |
|
Definition
conducted several experiments on electricity and concluded that an object could have one of two charges.. postive or negative.
(he didn't know where the charges came from though) |
|
|
Term
| what did JJ thomson do? (3) |
|
Definition
-conducted experiments on cathode ray tubes
-found that the stream was influenced by electric and magnetic fields
-concluded that they ray was composed of negatively charge particles.. ELECTRONS |
|
|
Term
|
Definition
|
|
Term
| What is a cathode ray tube? |
|
Definition
| an evacuated glass tube in which a stream of electrons emitted by a cathode strikes a fluorescent material causing it to glow |
|
|
Term
| What did JJ thomson look like? |
|
Definition
|
|
Term
| Extra fun fact about thomson? |
|
Definition
| he found the charge to mass ratio of an electron |
|
|
Term
| What is the charge to mass ratio of an electron? |
|
Definition
|
|
Term
| What did Robert milikan conduct his famous oil drop experiment to find what? |
|
Definition
| the mass and charge of an electron |
|
|
Term
| What is the mass of an electron? |
|
Definition
|
|
Term
| What is the charge of an electron? |
|
Definition
|
|
Term
| What did Henry Becquerel find? |
|
Definition
| uranium.. and that it exhibits radioactivity |
|
|
Term
|
Definition
| the spontaneous emission of radiation from an element |
|
|
Term
| Who else isolated other radioactive elements, radium, and polonium? |
|
Definition
|
|
Term
| What did scientists discover the more they studied radioactivity? |
|
Definition
| that radioactivity accompanies fundamental changes in an atom |
|
|
Term
| Who came up with the plum pudding model? |
|
Definition
|
|
Term
|
Definition
| conduct his famous Gold Foil experiment and proposed an atom had a postively charge nucleus |
|
|
Term
| What are atoms composed of? |
|
Definition
| protons, neutrons, and electrons |
|
|
Term
| What in an atom contains the protons and neutrons? |
|
Definition
|
|
Term
| What move in space around the nucleus? |
|
Definition
|
|
Term
| know the charge, mass (g) and mass (amu) of subatomic particles? |
|
Definition
|
|
Term
| What is the number of protons called? |
|
Definition
|
|
Term
|
Definition
| a charge atom, positive or negative |
|
|
Term
| How do you determine the charge of an atom? |
|
Definition
| number of protons - number of electrons. |
|
|
Term
|
Definition
| atoms that have the same number of protons but different number of neutrons |
|
|
Term
| What is an atomic mass unit? |
|
Definition
| a unit used by chemists for measuring the mass of atoms |
|
|
Term
|
Definition
| the average mass of the isotopes of an element |
|
|
Term
| What is a nuclear reaction? |
|
Definition
| a reaction that changes the composition of an atom's nucleus |
|
|
Term
| What is strong nuclear force? |
|
Definition
| force that holds the nucleus together |
|
|
Term
| Why would nuclei ever be unstable? |
|
Definition
| if they contain too few or too many neutrons |
|
|
Term
| What are the three types of radioactive decay? |
|
Definition
|
|
Term
| What is radioactive decay? |
|
Definition
| atom emits one or more type of radiation |
|
|
Term
| What is a nuclear equation? |
|
Definition
| an equation that represents nuclear decay |
|
|
Term
| Energy is defined as the capacity to..? |
|
Definition
|
|
Term
| Example of potential energy (3) |
|
Definition
1. A dry-cell battery in your camera
2. The water behind a dam
3. The gasoline in your car tank |
|
|
Term
| The SI scale used to measure temperature is the ___? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| The law of conservation of matter states: |
|
Definition
Matter is neither created nor destroyed in any process
(I know you already have this one, but study it again!) |
|
|
Term
| The new properties observed during a change of state are not signs of a chemical change because? |
|
Definition
| The chemical identity of the substance has not been altered. |
|
|
Term
| Example of a chemical change? |
|
Definition
Burning a piece of toast
(there will be bread for you in the morning, Ash) |
|
|
Term
| Elements and compounds are both considered pure substances because they...? |
|
Definition
| Have a unique set of chemical and physical properties |
|
|
Term
| Electrolysis could be used to? |
|
Definition
| Seperate water into oxygen and hydrogen gas |
|
|
Term
| Both homogeneous and heterogeneous mixtures..? |
|
Definition
| Are blends of 2 or more pure substances |
|
|
Term
| NOT a heterogeneous mixture? |
|
Definition
|
|
Term
|
Definition
| The smallest particle of an element that retains the chemical identity of that element |
|
|
Term
| Dalton's atomic theory did NOT include the postulate that..? |
|
Definition
| Atoms contain electrons, protons and nuetrons |
|
|
Term
| The electrical charges in an atom are located? |
|
Definition
|
|
Term
| J.J. Thomson concluded that a cathode ray? |
|
Definition
1. Produced a green spot on the fluorescent screen
2. A magnetic field deflected by electrically charged plates |
|
|
Term
| Rutherford's alpha scattering experiment indicated that? |
|
Definition
| Positive charges are concentrated in a very small core at the atom's center |
|
|
Term
| True statement about radiationq |
|
Definition
| Beta radiation consists of high-speed electrons. |
|
|
Term
| Scientists have determined that electrons..? |
|
Definition
| Move in the space around the nucleus |
|
|
Term
| Atoms of each element contain a unique number of |
|
Definition
|
|
Term
| Two isotpes of the same element may have different? |
|
Definition
| Mass numbers and numbers of neutrons |
|
|
Term
| An atom may be radioactive if the nucleus contains? (3) |
|
Definition
1. More than 83 protons
2. Too few neutrons
3. Too many neutrons |
|
|
Term
| What is the frequency of a wave inversely proportional to? |
|
Definition
|
|
Term
| What is the speed of light? |
|
Definition
|
|
Term
| What type of waves are microwaves shorter than? |
|
Definition
|
|
Term
| What energy is emitted or absorbed by any object in fixed amounts? (proposed by radio waves) |
|
Definition
|
|
Term
| What does the photoelectric effect depend on? |
|
Definition
the energy of photons
(proposed by einstein) |
|
|
Term
| Light is said to have properties of both particles aaaaand???? |
|
Definition
|
|
Term
| What do you need to know about the line spectrum of an element? |
|
Definition
1.its produced when elements emit light
2. it can be used to identify elements. |
|
|
Term
| Why did Bohr postulate that elements have enique line spectra? |
|
Definition
| because the energy of electrons is quantized. |
|
|
Term
| What does the Heisenberg unceertainty principle state? |
|
Definition
| that in measuring the psition of an electron you invariably change the electrons charge |
|
|
Term
| What orbital is shaped like a dumbell? |
|
Definition
|
|
Term
| What are the rpincipal energy levels of an atom? |
|
Definition
|
|
Term
| What is the Aufbau principle? |
|
Definition
| the statement that electrons must be added one at a time to the lowewst energy orbitals available. |
|
|
Term
|
Definition
| A region of space where an electron with a particular energy is likely to be found |
|
|
Term
| What does the brightness of light depend on? |
|
Definition
| the amilitude of the wave. |
|
|
Term
| What type of waves have longer wavelenths than visible light? |
|
Definition
| radio waves and microwave |
|
|
Term
| What type spin are electrons to have in order to occupy the same oribital? |
|
Definition
|
|
Term
| Any form of electromagnetic radiation (light) regardless of wavelength will travel at what speed? |
|
Definition
|
|
Term
| What is the equation for the speed of light? |
|
Definition
|
|
Term
| What is the electromagnetic spectrum? |
|
Definition
|
|
Term
| What 4 characteristics are all waves described? |
|
Definition
amplitude
wavelength
frequency
speed |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| how fast the wave oscillates up and down |
|
|
Term
|
Definition
| how fast the wave travels through a medium |
|
|
Term
Who proposed the Quantum Theory?
What year and country? |
|
Definition
physicist Max Planck
germany, 1900 |
|
|
Term
| What did Max Planck propose in 1900? |
|
Definition
| that there is a fundamental restriction on the amounts of energy that an object emits or absorbs |
|
|
Term
| What is a Quantum? (plural) |
|
Definition
| fixed amount of energy (Quanta) |
|
|
Term
What is the quantum theory?
(definition and equation) |
|
Definition
it related energy to the frequency of light emitted or absorbed by a substance.
E = hv h is planck's constant and v is frequency |
|
|
Term
| What is the photoelectric effect? |
|
Definition
| when electrons are ejected from a metallic surface when light shines on the metal |
|
|
Term
| What did einstein use to prove the photelectric effect? |
|
Definition
|
|
Term
| German Physicist who proposed that there is a fundamental restriction on the amounts of energy that an object emits or absorbs |
|
Definition
|
|
Term
|
Definition
| tiny particles of light that consisit of a quanta of energy |
|
|
Term
| What is a fixed amount of energy? |
|
Definition
|
|
Term
| What is the speed of light? |
|
Definition
|
|
Term
| All waves are described in terms of 4 characteristics. What are they? |
|
Definition
1. Amplitude: height of the wave
2. Wavelength: length of the wave
3. Frequency: how fast the wave moves up and down
4. Speed: how fast it travels through a medium |
|
|
Term
|
Definition
| a spectrum that only contains certain colors of light |
|
|
Term
|
Definition
| an instrument used to split light into its individual wavelengths |
|
|
Term
| What is the electromagnetic spectrum? |
|
Definition
|
|
Term
| What is wave-particle duality? |
|
Definition
| waves have particle-like characteristics (photoelectric effect) and particles have wave-like characteristics (matter waves) |
|
|
Term
| What's the photoelectric effect? |
|
Definition
| Electrons are ejected from a metallic surface when light shines on the metal. |
|
|
Term
| What is a quantum mechanical model? |
|
Definition
| a wave model that models the atom with electrons acting like waves rather than particles |
|
|
Term
| What is electron density? |
|
Definition
| the region of high probability where electrons could exist |
|
|
Term
| Who proved the Photoelectric effect? |
|
Definition
|
|
Term
|
Definition
| a region around the nucleus where an electron is likely to be found |
|
|
Term
| Know what colors you see normaly vs. what colors you see with a spectrascope |
|
Definition
|
|
Term
| Electrons exist in orbits around the nucleus in areas called what? |
|
Definition
|
|
Term
| Each energy level is labeled by what? |
|
Definition
|
|
Term
| What is the lowest energy level? |
|
Definition
|
|
Term
| What will an electron do when it absorbs a fixed amount of energy? |
|
Definition
| it will jump to a higher energy level |
|
|
Term
| Who came up with the uncertainty principle? |
|
Definition
|
|
Term
| What is each energy level labled by? |
|
Definition
|
|
Term
| What is the uncertainty principle? |
|
Definition
| the proposition that the position and momentum of moving particles cannot simultaneously be measured and known exactly |
|
|
Term
|
Definition
| The lowest energy level (n=1) |
|
|
Term
| Does the uncertainty principle matter for large objects? |
|
Definition
|
|
Term
| What must you have for two electrons to exist? |
|
Definition
|
|
Term
| What is the reason we can't locate electrons? |
|
Definition
| the uncertainty principle |
|
|
Term
| What are all the different orbital shapes? |
|
Definition
|
|
Term
| what are principal energy levels? |
|
Definition
| quantum numbers from the Bohr model |
|
|
Term
| what type of energy level can be divided into sub levels? |
|
Definition
|
|
Term
|
Definition
| using the principal energy level and orbital shape |
|
|
Term
| Know how to do electron configuration! |
|
Definition
Electron configuration
s=2 p=6 d=10 f=14
Orbital Diagram
s=1 p=3 d=5 f=7 |
|
|
Term
| The number of sublevels =? |
|
Definition
|
|
Term
| What is the rule with electron spin? |
|
Definition
| that spinning electrons can pair up if the spin is opposite |
|
|
Term
| What is electron configuration with boxes? |
|
Definition
|
|
Term
| What is electron configuration? |
|
Definition
| the distribution of electrons among levels, sublevels, and orbitals |
|
|
Term
| Know the difference between ground state and excited state! |
|
Definition
| Ground is where the electron normaly sits on the Bohr model. Excited state is when the electron jumps to the next energy level. |
|
|
Term
| What is the aufbau principle? |
|
Definition
| that electrons are added to the lowest energy level one at a time |
|
|
Term
| What is the Pauli Exclusion principle? |
|
Definition
| orbitals that can hold a max of 2 electrons with oppsite spin |
|
|
Term
|
Definition
| one electron per orbital before pairing |
|
|
Term
| What are some differences between the quantum model and bohr model? |
|
Definition
The bohr model is easier to read and understand. It also has rings and orbits around it like the sun.
The quantum model has many different shapes and is harder to understand. waves. |
|
|
Term
| Order of electron configuration... |
|
Definition
1s
2s 2p
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d 6f
7s 7p 7d 7f..... |
|
|
Term
| Why were the flames in our lab colorful?? (This one will be a short answer on test) |
|
Definition
| When you light the chemical on fire, the electrons get excited and move to the next energy level by giving of energy in the form of light...in this case, many different colors of light. |
|
|
Term
| What's the difference between the Bohr model and the quantum mechanical model? |
|
Definition
| The Bohr model has ORBITS and rings. The quantum mechanical model has multiple different shapes and it has ORBITALS. |
|
|
Term
| What is frequency measured in? |
|
Definition
|
|
Term
| What is frequency measured in? |
|
Definition
|
|
Term
| What is speed measured in? |
|
Definition
|
|
Term
|
Definition
| Don't ask. I had it written down, so I put it in here. |
|
|
Term
|
Definition
| h = Plank's constant (6.6262 x 10^-35 J-s) |
|
|
Term
|
Definition
| c = speed of light (3.00 x 10^8 m/s) |
|
|
Term
| What is the energy of motion? |
|
Definition
|
|
Term
| What type of energy is an example of kinetic energy? |
|
Definition
|
|
Term
| What type of energy is possessed by objects because of their position or arrangement? |
|
Definition
|
|
Term
| What is the unit of energy? |
|
Definition
|
|
Term
| What is the definition of a calorie? |
|
Definition
| the amount of heat needed to raise the temperature of 1 gram of water up one degree Celsius. |
|
|
Term
| What is the SI unit of energy? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| What is the law of conservation of energy? |
|
Definition
| energy is neither created nor destroyed by any process |
|
|
Term
|
Definition
| the temperature at which the motion of the particles within the substance ceases, kinetic energy is zero. 0 degress K.. -273 degrees C |
|
|
Term
|
Definition
| anything that has mass and volume |
|
|
Term
| What is a solid state of matter? |
|
Definition
|
|
Term
| What is the liquid state of matter? |
|
Definition
| regular volume, irregular shape |
|
|
Term
| What is the gas state of matter? |
|
Definition
| irregular shape and volume |
|
|
Term
|
Definition
| change from one state of matter to another |
|
|
Term
| What has chemical properties and can undergo physical and chemical changes? |
|
Definition
|
|
Term
| What are physical properties? |
|
Definition
| characteristics that can be observed without altering the substance |
|
|
Term
| What are chemical properties? |
|
Definition
| characteristics that cannot be observed without altering the substance |
|
|
Term
| What is a physical change? |
|
Definition
| a change that doesn't change the substance |
|
|
Term
| What is a chemical change? |
|
Definition
| a change where a new substance is formed |
|
|
Term
| What is the conservation of matter? |
|
Definition
| matter cannot be created or destroyed in any process |
|
|
Term
| What did Antonie Lavoisier do? |
|
Definition
| conducted experiments to prove that the total mass of the substances in an experiment will not change |
|
|
Term
|
Definition
| a substance that cannot be separated into simpler substances by a chemical change |
|
|
Term
| What contains all known elements? |
|
Definition
|
|
Term
| T or F, elements are not pure substances? |
|
Definition
FALSE SUCKER!
Elements are pure substances |
|
|
Term
| What is a pure substance? |
|
Definition
| any substance that is made up of one kind of material with a unique set of chemical and physical properties |
|
|
Term
|
Definition
| two or more elements combined by a chemical reaction. They are also pure substances and can be separated. |
|
|
Term
|
Definition
| a blend of two or more pure substances |
|
|
Term
| What are homogeneous mixtures? |
|
Definition
| mixtures that are the same throughout, and has no visible different parts |
|
|
Term
| what are heterogeneous mixtures? |
|
Definition
| not the same throughout, has visible different parts |
|
|
Term
| Can mixtures be separated? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| What did Democritus propose? |
|
Definition
| that all matter is actually composed of tiny indivisible particles which he termed "atoms" |
|
|
Term
|
Definition
| the smallest particle of an element that retains the chemical identity of that element |
|
|
Term
| What did Lavoisier do in chapter 3? :D |
|
Definition
| he studied the conservation of matter |
|
|
Term
| What did the experiments of Lavoisier lead to? |
|
Definition
| Joseph Proust conducting experiments on the law of constant composition. |
|
|
Term
| What is the law of constant composition? |
|
Definition
| a given compound will always contain the same elements in the same proportion |
|
|
Term
| Who came up with the atomic theory? |
|
Definition
|
|
Term
| What are the postulates to the atomic theory? (4) |
|
Definition
1. Each element is composed of extremely small particles called atoms
2. All atoms of a given element are identical, but they differ from those of any other element.
3.Atoms are neither created nor destroyed in any chemical reaction
4.A given compound always has the same relative numbers and kinds of atoms |
|
|
Term
| What did Michael Faraday suggest/state? |
|
Definition
| that the structure of atoms was somehow related to electricity, and that atoms contain particles that have electrical charge. |
|
|
Term
| What did Ben Franklin do? |
|
Definition
conducted several experiments on electricity and concluded that an object could have one of two charges.. postive or negative.
(he didn't know where the charges came from though) |
|
|
Term
| what did JJ thomson do? (3) |
|
Definition
-conducted experiments on cathode ray tubes
-found that the stream was influenced by electric and magnetic fields
-concluded that they ray was composed of negatively charge particles.. ELECTRONS |
|
|
Term
|
Definition
|
|
Term
| What is a cathode ray tube? |
|
Definition
| an evacuated glass tube in which a stream of electrons emitted by a cathode strikes a fluorescent material causing it to glow |
|
|
Term
| What did JJ thomson look like? |
|
Definition
|
|
Term
| Extra fun fact about thomson? |
|
Definition
| he found the charge to mass ratio of an electron |
|
|
Term
| What is the charge to mass ratio of an electron? |
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Definition
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Term
| What did Robert milikan conduct his famous oil drop experiment to find what? |
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Definition
| the mass and charge of an electron |
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Term
| What is the mass of an electron? |
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Definition
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Term
| What is the charge of an electron? |
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Definition
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Term
| What did Henry Becquerel find? |
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Definition
| uranium.. and that it exhibits radioactivity |
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Term
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Definition
| the spontaneous emission of radiation from an element |
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Term
| Who else isolated other radioactive elements, radium, and polonium? |
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Definition
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Term
| What did scientists discover the more they studied radioactivity? |
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Definition
| that radioactivity accompanies fundamental changes in an atom |
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Term
| Who came up with the plum pudding model? |
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Definition
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Term
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Definition
| conduct his famous Gold Foil experiment and proposed an atom had a postively charge nucleus |
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Term
| What are atoms composed of? |
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Definition
| protons, neutrons, and electrons |
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Term
| What in an atom contains the protons and neutrons? |
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Definition
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Term
| What move in space around the nucleus? |
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Definition
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Term
| know the charge, mass (g) and mass (amu) of subatomic particles? |
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Definition
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Term
| What is the number of protons called? |
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Definition
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Term
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Definition
| a charge atom, positive or negative |
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Term
| How do you determine the charge of an atom? |
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Definition
| number of protons - number of electrons. |
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Term
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Definition
| atoms that have the same number of protons but different number of neutrons |
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Term
| What is an atomic mass unit? |
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Definition
| a unit used by chemists for measuring the mass of atoms |
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Term
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Definition
| the average mass of the isotopes of an element |
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Term
| What is a nuclear reaction? |
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Definition
| a reaction that changes the composition of an atom's nucleus |
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Term
| What is strong nuclear force? |
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Definition
| force that holds the nucleus together |
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Term
| Why would nuclei ever be unstable? |
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Definition
| if they contain too few or too many neutrons |
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Term
| What are the three types of radioactive decay? |
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Definition
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Term
| What is radioactive decay? |
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Definition
| atom emits one or more type of radiation |
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Term
| What is a nuclear equation? |
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Definition
| an equation that represents nuclear decay |
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Term
| Energy is defined as the capacity to..? |
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Definition
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Term
| Example of potential energy (3) |
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Definition
1. A dry-cell battery in your camera
2. The water behind a dam
3. The gasoline in your car tank |
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Term
| The SI scale used to measure temperature is the ___? |
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Definition
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Term
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Definition
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Term
| The law of conservation of matter states: |
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Definition
Matter is neither created nor destroyed in any process
(I know you already have this one, but study it again!) |
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Term
| The new properties observed during a change of state are not signs of a chemical change because? |
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Definition
| The chemical identity of the substance has not been altered. |
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Term
| Example of a chemical change? |
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Definition
Burning a piece of toast
(there will be bread for you in the morning, Ash) |
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Term
| Elements and compounds are both considered pure substances because they...? |
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Definition
| Have a unique set of chemical and physical properties |
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Term
| Electrolysis could be used to? |
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Definition
| Seperate water into oxygen and hydrogen gas |
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Term
| Both homogeneous and heterogeneous mixtures..? |
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Definition
| Are blends of 2 or more pure substances |
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Term
| NOT a heterogeneous mixture? |
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Definition
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Term
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Definition
| The smallest particle of an element that retains the chemical identity of that element |
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Term
| Dalton's atomic theory did NOT include the postulate that..? |
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Definition
| Atoms contain electrons, protons and nuetrons |
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Term
| The electrical charges in an atom are located? |
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Definition
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Term
| J.J. Thomson concluded that a cathode ray? |
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Definition
1. Produced a green spot on the fluorescent screen
2. A magnetic field deflected by electrically charged plates |
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Term
| Rutherford's alpha scattering experiment indicated that? |
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Definition
| Positive charges are concentrated in a very small core at the atom's center |
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Term
| True statement about radiationq |
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Definition
| Beta radiation consists of high-speed electrons. |
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Term
| Scientists have determined that electrons..? |
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Definition
| Move in the space around the nucleus |
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Term
| Atoms of each element contain a unique number of |
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Definition
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Term
| Two isotpes of the same element may have different? |
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Definition
| Mass numbers and numbers of neutrons |
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Term
| An atom may be radioactive if the nucleus contains? (3) |
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Definition
1. More than 83 protons
2. Too few neutrons
3. Too many neutrons |
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