Hafnium

Source: http://www.tabulka.cz/english/elements/show.asp?id=72

name Hafnium
latin Hafnium
french Hafnium
german Hafnium
symbol Hf
proton number 72
atomic weight 178.49
Pauling electronegativity 1.3
electronic configuration [Xe] 4f145d26s2
1s22s22p63s23p63d104s24p64d105s25p64f145d26s2
melting point 2506 K, 2233°C, 4051°F
boiling point 4876 K, 4603°C, 8317°F
group 4
period 6
state (by 20°C) solid
oxidation states +4

Discoverer

Year of discovery Discoverers
1923 Dirk Coster
Georg von Hevesy


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