The alkali metals are found in Group 1 of the Periodic Table and they are highly reactive and usually found with other elements in nature, rarely by themselves. These are silvery colored, soft, low density metals.
Hydrogen is also found in group 1, even though it is classified as a Other Nonmetal. It rarely has the characteristics of an alkali metal, but when it is under extremely high pressure it acts like one.
| Name | Symbol | Atomic Number | Group | Period |
|---|---|---|---|---|
| Caesium | Cs | 55 | 1 | 6 |
| Francium | Fr | 87 | 1 | 7 |
| Lithium | Li | 3 | 1 | 2 |
| Potassium | K | 19 | 1 | 4 |
| Rubidium | Rb | 37 | 1 | 5 |
| Sodium | Na | 11 | 1 | 3 |
