Periodic Table of the Elements: Iridium

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Periodic Table of the Elements: Iridium
Atomic Number:77
Atomic Symbol:Ir
 Iridiumiridium
, metallic chemical element; symbol Ir; at. no. 77; at. wt. 192.217; m.p. about 2,410°C;; b.p. about 4,130°C;; sp. gr. 22.55 at 20°C;; valence +3 or +4.
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Atomic Weight:192.217
Electron Configuration:2 · 8 · 18 32 · 15 · 2
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