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Lanthanum

(La)

Category

Lanthanoid

Series

lanthanide

Relative atomic mass

138.90547

Density

6.17

Melting point (°C)

1193

Boiling point (°C)

3454

Electronegativity (Pauling)

1.1

Discovery year

1839

Discovered by

Carl Gustaf Mosander

created by @lukaswyss

Lanthanum (La) – Element 57