Pm61 – Promethium

• Atomic Number: 61
• Atomic Symbol: Pm
• Atomic Name: Promethium
• Atomic Mass: 144.91276
• CPK Hex Color: A3FFC7
• Electron Configuration: [Xe]6s2 4f5
• Electron Negativity:
• Atomic Radius: 236
• Ionization Energy: 5.55
• Electron Affinity:
• Oxidation States: 3
• Standard State: Solid
• Melting Point: 1315
• Boiling Point: 3273
• Density: 7.26
• Group Block: Lanthanide
• Year Discovered: 1945

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