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 >> show long 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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