Atomic Number 69     Atomic Mass 168.934212     Density 9.3208 g/mL

State solid     Color silvery white

Melting Point 1545°C     Boiling Point 1947°C

Natural Isotope Tm-169 100%

Abbreviated Electron Configuration [Xe] 4f¹³ 6s²

Discovered by Per Theodor Cleve in 1879.