Ir
Iridium
Z 77 192.217 g/molTransition Metal
Nucleus
77 Protons
115 Neutrons
77 Electrons (9 Valence)
Shell distribution: K2 • L8 • M18 • N32 • O15 • P2 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Xe]4f145d76s2
Radii
Empirical
135 pm1.35 Å
Calculated
180 pm1.8 Å
Covalent
141±6 pm1.41±0.06 Å
van Der Waals
202 pm2.02 Å
Oxidation States
CommonRare
-3
-2
-1
0
0
+1
+2
+3
+4
+5
+6
+7
+8
+9
Crystal Structure
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Face-centered Cubic