Chemical Elements.com - Lanthanum (La)

“Basic Information Name: Lanthanum Symbol: La Atomic Number: 57 Atomic Mass: 138.9055 amu Melting Point: 920.0 °C (1193.15 K, 1688.0 °F) Boiling Point: 3469.0 °C (3742.15 K, 6276.2 °F) Number of Protons/Electrons: 57 Number of Neutrons: 82 Classification: Rare Earth Crystal Structure: Hexagonal...” (from the page’s text)

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