| A | B |
|---|
| element | found on periodic table |
| mixture | seperated by physical means |
| compound | seperated by chemical means |
| atom | smallest part of an element |
| molecule | smallest part of a compound |
| proton | positively charged subatomic particle |
| neutron | neutral subatomic particle |
| electron | negatively charged subatomic particle |
| chemical change | new substance, irreversible |
| physical change | can be undone |
| homogeneous | evenly blended mixture |
| heterogeneous | varied mixture |
| weight | gravitys pull on a body |
| mass | amount of stuff in a body |
| matter | has mass and volume |
| metal | has luster and can conduct |
| metalloid | intermediate between a metal and a nonmetal |
| non-metal | brittle and poor conductor |
| Dalton | father of atomic theory- had 4 postulates- WITH PROOF |
| Democritus | greek philosopher scientist - stuff is made of particles- NO PROOF |
| BrINClHOF | diatomic molecules |
| Mendeleeve | maker of modern periodic table |
| Dobereiner | law of triads |
| Newlands | law of octaves |
| noble gases | VIII |
| alkali metals | IA form acids |
| alkaline earths | IIA form bases |
| halogens | VII form salts |
| inert | cannot form compounds |
| Neils Bohr | diagrammed the atom, showed shells |
| atomic number | number of protons ( which in an atom = the number of electrons) |
| atomic mass | protons + neutrons |
| Ernest Rutherford | found nucleus of atom |
| family/group | vertical column |
| series/period | horizontal row |
| atomic radius | larger to left of a period and larger to bottom of a family |
| transition elements | reactions vary |
