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| The smallest particle of life. Something cannot be broken down anymore from this point. |
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| One specific type of atom. Listed on periodic table. |
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| When two or more different atoms are combined but can still be separated. |
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| When two or more different atoms are combined but can only be broken down with chemical reactions. |
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| When atoms are held together by lost or gained electrons. |
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| When atoms are held together by shared electrons. |
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| When the percent composition of each object in the mixture is the same. |
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| When the percent composition of each object in the mixture is different. |
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| Plus one charge. Subatomic particle. Located in the nucleus. Relative mass of one. |
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| No charge. Subatomic particle. Located in the nucleus. Relative mass of one. Can be lost or gained to form isotopes. |
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| Minus one charge. Subatomic particle. Located in the electron cloud. Relative mass of zero. Can be gained or lost to form ions. Discovered in Milikan's Oil Drop experiment. |
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| When the chemical composition of an object is changes through a chemical reaction. (Ex: burning a log) |
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| Having to do with the chemical composition of objects. |
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| When the chemical composition of an object remains the same but the object may look different. (Ex: shredding paper) |
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| Having to do with the appearance of objects. |
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| How much space something has inside. |
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| How much matter an object has. |
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| When the number of neutrons has changed. results in a different mass number. |
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| When electrons are gained or lost. Either anion or cation. Have charge. |
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| Unit for amount of substance. Count of the total number of particles in an atom. |
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| When electrons are lost. Positive. |
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| When electrons are gained. Negative. |
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| Conducted Oil Drop experiment. Found the size of the electron's mass and charge. |
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| Conducted Cathode Ray Tube experiment. Plum Pudding model. Found that subatomic particles exist and mass to charge ratio of electrons. |
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| Created earliest periodic table. Ordered elements by atomic mass. |
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| Inspired by Democritus. Came up with atomic theory similar to today's. |
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| Well known Greek philosopher of the time. Believed the earth was composed of four elements: Earth, Fire, Water, Wind. He disagreed with Democritus. Everyone agreed with him. |
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| Greek philosopher who first came up with the concept of an atom. No one believed him. |
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| Organized particles, definite shape and volume. |
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| Unorganized particles, indefinite shape but definite volume. |
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| Unorganized particles, indefinite shape and volume. |
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| Very fast and random particles, so much energy that electrons are liberated. |
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| When balancing, DON'T TOUCH... |
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| Mass can't be created or destoyed. |
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| Why are equations balanced? |
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| To find an accurate and pricise measurement, along with correct atom counts. |
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| Act as an equal sign in chemical reactions. |
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| When heat is released internally in a reaction. |
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| When heat is released externally in a reaction. |
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| Heisenberg Uncertainty Principle |
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| One cannot know the speed and location of an electron at the same time. |
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| Highest energy level of atoms. This is where electrons are gained or lost. |
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| An ion with only one element. |
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| An ion with two or more elements. |
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| J.J. Thompson's model of the atom. The electrons represent the plum pieces. Looks like a chocolate chip cookie if you don't know what plum pudding is. |
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| The most recent and current model of the atom. |
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| Bohr's model of the atom. Only valid with Hydrogen. |
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| When an electron spins in the opposite direction than that of the electron which it shares the orbital with. |
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| Meaning eight electrons. When an atom has all orbitals filled completely. |
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| The recommended order of balancing equations. Metals, Polyatomic ions, Non-metals, Oxygen, Hydrogen |
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| Noble gases are extremely stable and do not react. |
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| When you only list the electron configuration of an element after its preceding Noble Gas. |
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| Used for a flame in labs. |
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| Barrel, Air ports, Gas inlet, Base, Needle Valve |
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| Anything which takes up space. |
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| Recommended flame to use in labs |
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| Noisy, blue, stable, cone-shaped flame. |
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| Conducted Gold Foil experiment. Found the nucleus and that atoms are mostly empty space. |
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| When you write the element symbol and draw dots around it symbolizing how many valence electrons it shares. |
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| How close the electrons are pulled to the nucleus. |
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| Oil was dropped and then charged in the middle of its fall. Found the size of the mass and charge of the electron. Done by Millikan. |
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| Cathode Ray Tube Experiment |
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| Electrons were passed through a tube and then placed against a negative charge. Found out about subatomic particles and mass to charge ratio of electrons. Done by Thompson. |
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| Radioactive alfa-particles were shot into a piece of gold. Found that atoms were mostly empty space and that nuclei exist. Done by Rutherford. |
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| The study of matter and the changes it undergoes. |
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| The path electrons travel. |
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| A mathematical representation of the space electrons take up. |
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| An electron's ability to attract other electrons. |
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| Finding out the percentages that each compound has of each element. |
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| The energy required to form ions. |
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| 2 species with the same electron configuration. |
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| The number of atoms of each element. |
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| Ratio of the atoms of each element. |
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| A method of showing how many electrons an element has by means of orbitals. |
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| A drawing which shows the sharing of electrons between elements in a covalent compound. |
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| The number of atoms of each element present in a molecule. |
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| The percent of the calculated yield versus the actually obtained amount. |
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| The reactant that determines how much of a product can be formed. |
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| A substance that has to do with hydrogen ions. |
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| A substance that has to do with hydroxide ions. |
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| Power of Hydrogen or the strength of an acid or base. |
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| A neutral precipitate formed. |
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| A reaction in which an acid and a base cancel each other out. |
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| A reaction in which electrons are transferred among elements. |
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| A reaction in which a solid precipitate is formed. |
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| An insoluble solid at the bottom of water. |
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