| A | B |
|---|
| Chemical bond | Forms when atoms exchange or share electrons |
| Energy Level | Surround the nucleus in the form of an electron cloud |
| Octet rule | Atoms form chemical bonds with other atoms by either sharing electrons, or transferring them in order to complete their octet and move to a lower energy state. |
| Valence electrons | The outermost energy level; the maximum number that an atom can have is eight. |
| Ions | Atoms become this when they either gain or lose an electron |
| Ionic bond | A bond between atoms in which electrons are lost or gained |
| Covalent bond | A bond between atoms in which electrons are shared |
| Binary compounds | Made of only two elements |
| Relative mass | Known as atomic mass unit |
| Polyatomic ions | Contain more than one type of atom |
| Monoatomic Ions | Consist of a single atom |
| Oxidation number | Indicates how many electrons are lost, gained, or shared when bonding occurs. |
