The Elements Table

The Interactive Periodic Table of Elements

  • 69 Tm Thulium 168.934
  • 69 Tm Thulium 168.934
  • 69 Tm Thulium 168.934
  • Vital Element Stats

  • Name: Thulium
  • Symbol: Tm
  • Weight: 168.934
  • Family: Lanthanide
  • Group: 69
  • Period: 2223
  • Composition

  • Electrons: 69
  • Protons: 69
  • Neutrons: ~100
  • Measurements

  • Density: 9.32 g/mL
  • Miscellaneous Facts

  • Discovered: 1885
  • Melting Point: 1818 o C , 3304.4 o F , 2091.15 o Kelvin
  • Boiling Point: 2223 o C , 4033.4 o F , 2496.15 o Kelvin
  • Cost: N/A