Metals, Alkali

**Definition:** Metals that constitute group 1(formerly group IA) of the periodic table. They are the most strongly electropositive of the metals. Note that HYDROGEN is not considered an alkali metal even though it falls under the group 1 heading in the periodic table.

**Tree numbers:** - D01.268.549 - D01.552.528

**Synonyms:** - Alkali Metal - Group 1 Element - Alkali Metals - Group 1 Elements