The Instrumentation Center

Neptunium

Np

Contributor: Be the contributor for this element!

About the Display:

  • Neptune Figurine: Neptune was the Roman god of the sea, for which the element is named after

About the Contributor:

Back to the Periodic Table

Symbol: Np

Atomic Number: 93

Atomic Mass: 237 amu

Electron Configuration: [Rn] 5f46d17s2

Year Discovered: 1940

Discovered By: Edwin McMillan and Philip Abelson

Last Updated: 7/30/18