Rubidium is represented by the symbol 'Rb' in the periodic table.

Element Symbol

Rubidium is a term mostly used in scientific contexts, not in everyday conversation.

Scientific Usage

Rubidium reacts violently with water and should be handled with care.

Chemical Properties

 where the change in energy is equal to a number, called Planck's constant, times the frequency. That characteristic frequency is what we need to make our clock. GPS satellites rely on cesium and rubidium atoms as frequency standards.