Term
| An unstoppable isotope that emits radiation as it decays |
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Definition
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Term
| It equals the total number of protons and neutrons. It is expressed in amu’s or daltons |
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Definition
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Definition
| What identifies an element? |
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Definition
| What are the four elements that make up more than 96% of the mass of most organisms? |
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Term
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Definition
| What is one element that all compounds have in common? |
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Term
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Definition
| What determines chemical activity of an atom? |
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Term
| Diagnosis, treatment, dates fossils, and info about DNA |
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Definition
| What are different uses for radioisotopes |
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Term
| Atoms of the same element with varying numbers of neutrons |
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Definition
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Term
| The number of electrons equals the number of protons |
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Definition
| If an atom is electrically neutral, what does that mean? |
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Term
| Reactants are written on the left side of the arrow and products are written on the right side of the arrow. |
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Definition
| What is the difference between reactant and products locations? |
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Term
| Avagadro’s number: 6.02 x 10^23 |
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Definition
| How many particles are in 1 mole of anything? |
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Term
| Mass of anything that it is in |
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Definition
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Term
| It shows the arrangement of atoms in a molecule |
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Definition
| What is a structural formula? |
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Term
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Definition
| How many electrons can be in the outermost shell? |
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Term
| Nonpolar covalent bond- when covalently bonded atoms have similar electronegatives and the electrons are shared equally. Polar covalent bond-bond between atoms that differ in electronegatives and the electrons are pulled closer to the nucleus of the atoms with greater electron affinity |
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Definition
| What is the difference between a nonpolar and a polar covalent bond? |
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Term
| Oxygen is more electronegative. It collects more electrons than hydrogen |
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Definition
| In water molecules, which elements are the most electronegative? |
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Term
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Definition
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Term
| It is a positively charged ion. It becomes positive by losing an electron |
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Definition
| What is a cation? How does it become positive? |
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Term
| Sodium loses 1 outer shell electron to chlorine |
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Definition
| How does sodium chloride form a compound with chlorine? |
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Term
| Ionic compounds dissociate into individual ions |
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Definition
| Why does table salt dissolve in water? |
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Term
| A mixture of anions and cations with opposite charges |
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Definition
| What type of atoms form ionic bonds? |
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Term
| The removal of oxygen atoms |
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Definition
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Term
| The tendency of water molecules to stick to one another |
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Definition
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Term
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Definition
| What 2 properties allow water to rise? |
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Term
| The amount of heat energy-equivalent to 4.184 (J)-required to raise 1 G of water 1 degree Celsius |
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Definition
| What does 1 calorie equal to? |
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Term
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Definition
| What causes water to have high surface tension? |
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Term
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Definition
| Large bodies of water have what type of temperature? |
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Term
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Definition
| Water takes heat when it what the body? |
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Term
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Definition
| Water is most dense at what degree of Celsius? |
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Term
| 10- the pH scale goes by factors of 10 |
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Definition
| pH of 1 is how much larger than a pH of 2? |
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Term
| A substance that resists changes in pH when an acid or base is added |
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Definition
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Term
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Definition
| What is the pH of blood? What elements on pH scale are similar to blood? |
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Term
-Carbon=forms backbone of organic molecules
-Hydrogen=ions are used in some energy transfers
-Oxygen=required for cellular respiration
-Nitrogen=component of chlorophyll in plants |
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Definition
| What are the four elements that make up all living things? Tell 1 use of each. |
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Term
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Definition
| What are compounds that contain carbon? |
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Term
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Definition
| What does atomic number determine? |
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Term
| Electrons that are transferred between atoms |
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Definition
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Term
| Cations are atoms with 1,2, or 3 valence electrons tend to lose electrons to other atoms and become positively charged. Anions are atoms with 5, 6, or 7 valence electrons and are negatively charged. |
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Definition
| What is the difference between cations and anions? |
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Term
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Definition
| _____ pH on the scale is less than 7. _____ on pH scale are greater than 7. |
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Term
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Definition
| bonds that are weak, hydrogen to oxygen |
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Definition
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Definition
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Term
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Definition
| Bond that involves structural sharing |
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Term
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Definition
| action that involves sticking unlike molecules |
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Term
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Definition
| action that involves sticking alike molecules |
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Term
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Definition
| action that involves water moving up |
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Term
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Definition
| action that makes insects walk on water |
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Term
| Extra heat when you get hot is taken to hydrogen bonds. Sweat takes extra heat with it. |
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Definition
| Why are hydrogen bonds able to keep body temperature constant? |
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