Np93 – Neptunium

  • Atomic Number: 93
  • Atomic Symbol: Np
  • Atomic Name: Neptunium
  • Atomic Mass: 237.048172
  • CPK Hex Color: 0080FF
  • Electron Configuration: [Rn]7s2 5f4 6d1
  • Electron Negativity: 1.36
  • Atomic Radius: 221
  • Ionization Energy: 6.266
  • Electron Affinity:
  • Oxidation States: +6, +5, +4, +3
  • Standard State: Solid
  • Melting Point: 917
  • Boiling Point: 4175
  • Density: 20.25
  • Group Block: Actinide
  • Year Discovered: 1940

Periodic Table of Elements. (2022, December 23). In PubChem and the National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/periodic-table/#view=table