Neptunium

Neptunium
Name	Neptunium
Symbol	Np
Atomic number	93
Atomic mass	237 amu
Normal state	Solid
Classification	Metallic
Crystal structure	Orthorhombic
Color	silvery
Date of discovery	1940
Name of discoverer	Edwin M. McMillan, Philip H. Abelson
Name origin	Named after the planet Neptune.
Uses	Used in neutron detection instruments.
Obtained from	Produced by bombarding uranium with slow neutrons. Although it is present in uranium rich ores, it is not extracted from this source. Not found outside nuclear or research facilities.

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Neptunium
Name	Neptunium
Symbol	Np
Atomic number	93
Atomic mass	237 amu
Normal state	Solid
Classification	Metallic
Crystal structure	Orthorhombic
Color	silvery
Date of discovery	1940
Name of discoverer	Edwin M. McMillan, Philip H. Abelson
Name origin	Named after the planet Neptune.
Uses	Used in neutron detection instruments.
Obtained from	Produced by bombarding uranium with slow neutrons. Although it is present in uranium rich ores, it is not extracted from this source. Not found outside nuclear or research facilities.