| A | B |
|---|
| Periodic Law | Governs the repeating nature of the properties of elements |
| Metals | good conductors, malleable, ductile, shiny (left of staircase) |
| Metalloids | elements that have some properties of both metals and nonmetals (on the staircase) |
| Nonmetals | non-conductors, dull, brittle (right on staircase) |
| Alkali Metals | Column IA (Li family) |
| Alkali Earth Metals | Column IIA (Be family) |
| Halogens | Column VIIA (F family) |
| Noble Gases | Column VIIIA (He family) |
| Transition Metals | Central elements on the periodic table |
| Inner Transition Metals | Elements on the bottom of the periodic table. |
| Representative Elements | Elements in the A groups. (center block) |
| Atomic Radius | The radius of a stable atom with a neutral charge. |
| Ion | The result of an atom that gains or loses an electron. |
| Ionic Radius | The radius of an atom after it loses or gains an electron |
| Ionization Energy | Energy required to remove an electron from an atom |
| Electronegativity | The relative attraction of an atom to the electron in a bond. |
