Boron

Metalloid

Symbol: B

Atomic Number: 5

Standard State: Solid

Atomic Mass: 10.81

Electron Configuration: [He]2s2 2p1

Electronegativity: 2.04

Atomic Radius: 192

Ionization Energy: 8.298

Melting Point: 2348

Boiling Point: 4273

Density: 2.37

Year Discovered: 1808