Name:  Rubidium

Atomic Symbol and Mass Number: Rb [37]

Electron Configurations of the Elements: [Kr] 5s

Atomic Radii: 248 pm

Electron Affinity: 46.9 kJ mol-1

Oxidation states:-1

Electronegativity value: 0.82

Elemental Group: Alkali Metal

Uses and properties:

• Soft, silvery-white metallic element

• Solid at room temperature but melts easily

• Reacts violently with water

• Spontaneous combustion in air

• Burns with a reddish-violet flame color

• Slightly radioactive

• Used in photocells to remove trace gases in vacuum tubes

• Working fluid in vapour turbines

• Purple color in fireworks

• Salts are used in glasses and ceramics

 

Lewis diagram: