Page "Alkali metal" Paragraph 3

Most alkali metals have many different applications.

Two of the most well-known applications of the pure elements are rubidium and caesium atomic clocks, of which caesium atomic clocks are the most accurate representation of time known as of.

A common application of the compounds of sodium is the sodium-vapour lamp, which emits very efficient light.

Table salt, or sodium chloride, has been used since antiquity.