| A | B |
|---|
| Law of Conservation of Mass | mass is constant, never created or distroyed |
| nucleus | determines the mass of the atom |
| Law of Multiple Proportions | Different chemicals have different formula depending on their mass |
| atom | smallest part of an element that keeps its properties |
| element | most simple type of pure substance |
| compound | combination of atoms |
| Dalton's Atomic Theory | 5 parts that explain the simplicity of atoms |
| Modern Atomic Theory | the newest theory of what things are made of |
| quarks | top, bottom, up, down, charm, strange |
| leptons | electrons, muon, tau, nutrinos |
| fundamental | simplest, smallest structures |
| strong nuclear force | the force that keeps the nucleus together |
| cathode | the + end of the cathode ray tube |
| anode | - end of the cathode ray tube |
| Thompson | this person discovered the electron |
| Rutherford | this person discovered the nucleus |
| alpha particles | Rutherford sent these particles through Au foil |
| atomic number | the ID of each element, also tells the protons in each element |
| isotope | atoms of the same element with different masses |
| mass number | total number of protons plus nuetrons |
| nuclide | another name for an isotope |
| atomic mass unit | more appropriate unit to measure the mass of atoms |
| average atomic mass | mass of all isotopes listed on the periodic table |
| mole | a "grouping" amount used to talk about numbers of atoms |
| Avagadro's Number | 6.022 x 10^23 |
| molar mass | mass of 1 mole of element |
| hyphen notation | one way to write an isotope, Example: Carbon-14 |
| nuclear symbol | one way to write an isotope, lists both atomic # and mass |
| positive | charge of a proton |
| protons and neutrons | these particles "live" in the nucleus |
| negative | charge of an electron |
| neutral | charge of a neutron |
| electron cloud | determines the volume of the atom |
| Law of Definite Proportions | any formula is constant, no matter the amount of sample |
