| A | B |
|---|
| valence electrons | electrons in the outermost energy level |
| ionic bonding | bonding that involves a transfer of electrons |
| ion | any charged atom |
| covalent bonding | bonding that involves a sharing of electrons |
| diatomic element | elements that form covalent bonds with atoms of the same element |
| metallic bond | bonds formed by atoms of metals, forms a "sea of electrons" |
| oxidation number | the number of electrons gained, lost, or shared when an atom forms a chemical bond |
| element | substance made from one type of atom |
| compound | two or more atoms joined together |
| nucleus | positively charged center of an atom |
| proton | subatomic particle with a positive charge |
| neutron | subatomic particle with a neutral charge |
| electron | subatomic particle with a negative charge |
| family 18 | elements with a full valence layer |
| malleable | can be hammered into thin sheets |
| ductile | can be drawn into wire |
| families | the vertical columns on the periodic table |
| periods | the horizontal columns on the periodic table |
| crystal lattice | the regular, repeating arrangement of atoms |
| molecule | two or more atoms covalently bonded together |
