| A | B |
|---|
| Alkali Metals | Most reactive metal group, not found freely in nature |
| Alkaline Earth Metals | Insoluble in water or fire with very high melting points |
| Transition Metals | Grouping that contains the most elements |
| Other Metals | Soft metals with low melting points |
| Metalloids | Group that has properties of both metals and nonmetals |
| Nonmetals | Group that is made up primarily of the elements essential for life (CHON) |
| Halogens | Most reactive of the nonmetals--not found freely in nature |
| Noble Gases | Group that is least reactive |
| Actinide Series | Group composed of primarily manmade or radioactive elements |
| Lanthanide Series | Rare Earth elements |
