Technetium

Source: http://www.tabulka.cz/english/elements/show.asp?id=43

name Technetium
latin Technetium
french Technétium
german Technetium
symbol Tc
proton number 43
atomic weight [98]
Pauling electronegativity 1.9
electronic configuration [Kr] 4d55s2
1s22s22p63s23p63d104s24p64d55s2
melting point 2430 K, 2157°C, 3914°F
boiling point 4538 K, 4265°C, 7709°F
group 7
period 5
state (by 20°C) solid
oxidation states +7

Discoverer

Year of discovery Discoverers
1937 Carlo Perrier
Emilio G. Segre (1905-1989)


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