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Neptunium
(Np)
Np
Category
Actinoid
Series
actinide
Relative atomic mass
237.0482
Density
20.45
Melting point (°C)
610
Boiling point (°C)
3100
Electronegativity (Pauling)
1.36
Discovery year
1940
Discovered by
Glenn T. Seaborg
created by @lukaswyss
Neptunium (Np) – Element 93