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Lanthanum

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name Lanthanum
latin Lanthanum
french Lanthane
german Lanthan
symbol La
proton number 57
atomic weight 138.9055
Pauling electronegativity 1.1
electronic configuration [Xe] 5d16s2
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melting point 1193 K, 920°C, 1688°F
boiling point 3743 K, 3470°C, 6278°F
group 3
period 6
state (by 20°C) solid
oxidation states +3
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Discoverer

Year of discovery Discoverer
1839 Carl G. Mosander

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