Periodic Table:

Element 5 - Borum / Boron

(Latin / English)

Mass Number

Atomic Mass

% Abundance

Nuclear Spin

10

10.0129

19.9

3+

11

11.0093

80.1

3/2-

(* = unstable isotope)

Electron Configuration:

[He] 2s2 2p1

Relative Atomic Mass:

10.811

State (25°C, 1 atm):

solid, non-metal

Density:

2340 kg/m3

Melting Temperature:

2573 K

Boiling Temperature:

3931 K

© W. Bauer, 1999