An Overview about the Chemical Element Promethium
August 30, 2015 Physical Science
Promethium Symbol: Pm Atomic Number: 61 Atomic Mass: 145.0 amu (atomic mass units) Melting Point: 1042C (1315 K, 1908F) Boiling Point: 3000C (3273 K, 5432F) Number of Protons: 61 Number of Electrons: 61 Number of Neutrons: 84 Classification: Rare Earth…
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