B
Boron
Z 5 10.81 g/molMetalloid
Nucleus
5 Protons
6 Neutrons
5 Electrons (3 Valence)
Shell distribution: K2 • L3 • M0 • N0 • O0 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[He]2s22p1
Radii
Empirical
85 pm0.85 Å
Calculated
87 pm0.87 Å
Covalent
84±3 pm0.84±0.03 Å
van Der Waals
192 pm1.92 Å
Oxidation States
CommonRare
-5
-1
0
0
+1
+2
+3
Crystal Structure
Use the arrow keys to rotate, hold Shift with the left and right arrows to roll, and press Home to reset the view.
Rhombohedral