Lithium

Atomic symbol: Li
Atomic number: 3
Atomic mass: 6.94

Appearance: silvery-white solid at 25°C

Group: 1
Period: 2
Series: Alkali metals
Block: s
Electron configuration: 1s² 2s¹

A highly flammable, reactive, and toxic metal.

Many applications and uses including in batteries, glass, ceramics, and medicine.

Fun Fact! Lithium is used as an effective drug as a mood stabilizer for the treatment of bipolar disorder alongside other mental health illnesses.

Machado-Vieira, Rodrigo et al. “The role of lithium in the treatment of bipolar disorder: convergent evidence for neurotrophic effects as a unifying hypothesis.” Bipolar disorders vol. 11 Suppl 2,Suppl 2 (2009): 92-109. doi:10.1111/j.1399-5618.2009.00714.x