How Many Valence Electrons Does Lithium Have?

How Many Valence Electrons Does Lithium Have?

Lithium has one valence electron. The atomic number of lithium is 3, and its electronic configuration is [He] 2S1. The lone valence electron occupies the second orbit around the nucleus of the lithium atom.

Lithium is a soft metal and has a silvery-white color. It is classified as an alkali metal and is in group 1 and period 2 of the Periodic Table of Elements. Its atomic weight is 6.941 atomic mass units, or grams per mole. It has a melting point of 180.50 degrees Celsius and a boiling point of 1,342 degrees Celsius. Lithium is a solid at room temperature with a density of 0.534 grams per cubic centimeter.