Terms : Hide Images
| 8615738766 | matter | anything that has mass and takes up space | 0 | |
| 8615740829 | atoms | the building blocks of matter | 1 | |
| 8615750578 | substance | has distinct properties + composition that does not vary from sample to sample | 2 | |
| 8615752063 | element | a substance which can not be decomposed to simpler substances | 3 | |
| 8615752498 | compound | a substance which can be decomposed to simpler substances | 4 | |
| 8615754776 | Law of Constant Composition | Compounds have a definite composition- the relative # of atoms of each element in compound= same in any sample | 5 | |
| 8615763423 | Mixtures | exhibit the properties of the substances that make them up | 6 | |
| 8615761840 | Homogeneous Mixture/Solution | Mixture that has the same composition throughout the sample | 7 | |
| 8615764930 | Heterogeneous Mixture | mixture that can vary in composition throughout a sample | 8 | |
| 8615768644 | Physical Properties | can be observed without changing a substance into another substance (i.e. BP, MP, density, mass, volume) - do not change the composition of the substance | 9 | |
| 8615770325 | Chemical Properties | can only be observed when a substance is changed into another substance (i.e. flammable, corrosive, reactivity w/ acid) - result in new substances (combustion, oxidation, decomposition) | 10 | |
| 8615775844 | Intensive Properties | independent of the amount of the substance that is present (i.e. density, BP, color) | 11 | |
| 8615776605 | Extensive Properties | depend upon the amount of the substance present (i.e. mass, volume, energy) | 12 | |
| 8615785568 | Physical Change | converting between states of matter (solid, liquid, gas) | 13 | |
| 8615789007 | mass | measure of the amount of material in an object | 14 | |
| 8615824282 | Law of Conservation of Mass | total mass of substances present at the end of a chemical process= mass of substances present before reaction | 15 | |
| 8615835169 | atomic number | number of protons of an element (subscript before the symbol) |  | 16 |
| 8615844166 | mass number | total number of protons + neutrons in the nucleus of an atom (superscript before the symbol) | | 17 |
| 8615848926 | isotopes | atoms of the same element with different masses b/c different # of neutrons, but same protons | 18 | |
| 8615851784 | atomic weight | average mass found using all isotopes of an element weighted by their relative abundances Atomic Weight = Ʃ [(isotope mass) × (fractional natural abundance)] | 19 | |
| 8615856373 | Periods | rows of periodic table | 20 | |
| 8615856374 | Groups | columns of periodic table - elements in same column have similar chemical properties | 21 | |
| 8615866037 | Empirical Formulas | lowest whole-number ratio of atoms of each element in a compound | 22 | |
| 8615868965 | Molecular Formulas | exact number of atoms of each element in a compound | 23 | |
| 8615871933 | Cation | ion formed when electrons are lost | 24 | |
| 8615871935 | Anion | ion formed when electrons are gained | 25 | |
| 8615874092 | ionic compound | formed between metals and nonmetals | 26 |
