| A | B |
|---|
| cation | an atom that has lost an electron and is positive |
| ion | an atom that has gain or lost an electron |
| anion | an atom( usually a nonmetal ) that has gained 1 or more electrons and is now negative |
| isotope | an atom that has gained or lost neutrons |
| Atomic number | the number of protons |
| Atomic Mass | the protons plus the neutrons |
| protons | subatomic particle with 1 amu + charge |
| neutron | subatomic particle with 1 amu 0 charge |
| electron | subatomic particle with 0 amu - charge |
| group | run vertical on periodic table, |
| period | run horizontal on periodic table |
| All elements in a group have the | same valence electrons and same oxidation # |
| All elements in a period have the | same # of energy orbitals |
| ionic bonds _________ electrons | transfer |
| ionic bonds are between | metals and non metals |
| covalent bonds _________ electrons | share |
| covalent bonds are between | non metals and non metals |
| Lewis dot diagram | shows only valence electrons |
| Bohr diagram | shows all electrons |
| valence electrons | the outer most electron |
| Cl has _____ valence electrons | 7 |
| O has _____ valence electrons | 6 |
| Mg has _____ valence electrons | 2 |
| Na has an oxidation number of | +1 |
| N has an oxidation number of | -3 |
| Ne has an oxidation number of | 0 |
