Iridium

Source: http://www.tabulka.cz/english/elements/show.asp?id=77

name Iridium
latin Iridium
french Iridium
german Iridium
symbol Ir
proton number 77
atomic weight 192.217
Pauling electronegativity 2.2
electronic configuration [Xe] 4f145d76s2
1s22s22p63s23p63d104s24p64d105s25p64f145d76s2
melting point 2739 K, 2466°C, 4471°F
boiling point 4701 K, 4428°C, 8002°F
group 9
period 6
state (by 20°C) solid
oxidation states +2, +3, +4, +6

Discoverer

Year of discovery Discoverer
1804 Smithson Tennant (1761-1815)


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