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chem word wall
| Question | Answer |
|---|---|
| Law | explains what happens. Has been proven true |
| Theory | Explains why something happens. Has not been proven true |
| Accuracy | an agreement of a particular value with the true value |
| precision | an agreement of several measurements made in the same way |
| heterogeneous | different throughout a solution |
| homogeneous | same throughout a solution |
| extensive properties | depends on the amount of matter that is present |
| intensive properties | do not depend on the amount of matter present |
| physical change | a change in a substance that doesn't involve a change in identity |
| chemical change | a change where a new substance is formed |
| condensing | gas to liquid |
| sublimination | solid to gas |
| deposition | gas to solid |
| empirical formula | smallest whole number or atoms |
| molecular formula | the actual number of atoms of each element |
| structured formula | uses lines to represent covalent bonds |
| mixture | two or more substances that are not chemically combined |
| element | simplest form of a pure substance |
| compound | pure substances that are combinations of elements |
| heat of vaporization | the heat needed to convert a liquid to gass |
| heat of fusion | heat needed to convert a solid to liquid |
| chemistry | study of composition and structure of matter |
| matter | anything that has mass and occupies space |
| atomic number | number of protons |
| atomic mass | number of neutrons + electrons |
| isotope | atoms of the same element w/ different atomic masses because of different numbers of neutrons |
| avagadros' number | 6.02 x 10 23rd |
| electron config. | the way electrons are arranged in an atom |
| valance electrons | electrons in an incomplete outer energy level |
| Aubau principle | electrons enter orbits of lowest energy level |
| pauli exclusion principle | an atomic orbital may describe at most 2 electrons |
| Hunds Rule | when electrons occupy orbitals of equal energy, one electron enters each suborbital until all the orbitals contain 1 electron pair w/ parallel signs |
| periodic law | physical & chemical properties of the elements are periodic functions of their atomic number |
| atomic radius | distance from center of nucleus to outer energy level |
| ionization energy | energy required to remove an electron from an atom |
| electron affinity | energy associated with the addition of an electron |
| cation | positive ion |
| anion | negitive ion |
| electron negitivity | measure of the ability of an atom in a chemical compound to attract electrons |
| solvet | what the solid is dissolved in |
| solute | the solid that dissolves in the liquid |
| saturated | the solvent can't dissolve anymore |
| unsaturated | the solvent can dissolve more |
| supersaturated | past saturation |
| miscible | liquids will mix together |
| immiscible | liquids will NOT mix together |
| diluting | adding more solvent |
| concentrating | adding more solute |
| law of conservation of mass | mass of reactants = mass of products |
| reactants | compounds to the left of the arrow |
| synthesis | A+B -> A+B |
| Decomp | AB -> A + B |
| single replacement | AB + C -> AC + B |
| double replacement | AB + CD -> AD + CB |
Created by:
fodge91
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