Alkali Metal

6 elements

The lightest metal and least dense solid element. Crucial for rechargeable batte...

Highly reactive metal that explodes in water. Combined with chlorine it forms ta...

Essential for heart function, muscle contraction, and nerve signals. Reacts viol...

Discovered by its dark red spectral lines, the name means dark red. Extremely re...

The international definition of a second is based on the cesium-133 atom. Most r...

The most unstable of the first 101 elements: no francium atom survives longer th...