The Elements Table

The Interactive Periodic Table of Elements

  • 61 Pm Promethium 145
  • 61 Pm Promethium 145
  • 61 Pm Promethium 145
  • Vital Element Stats

  • Name: Promethium
  • Symbol: Pm
  • Weight: 145
  • Family: Lanthanide
  • Group: 61
  • Period: 3273
  • Composition

  • Electrons: 61
  • Protons: 61
  • Neutrons: ~84
  • Measurements

  • Density: 7.22 g/mL
  • Miscellaneous Facts

  • Discovered: 1947
  • Melting Point: 1315 o C , 2399 o F , 1588.15 o Kelvin
  • Boiling Point: 3273 o C , 5923.4 o F , 3546.15 o Kelvin
  • Cost: N/A