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#69 Thulium - rarity ZERO-KELVIN
1st ionization energy 6.184 eV 0.85%
appearance Silvery gray metallic surface 0.85%
atomic mass 168.93 u 0.85%
atomic number 69 0.85%
atomic radius 227 picometers (van der Waals radius) 1.69%
boiling point 2223 K or 1950 °C or 3542 °F 0.85%
cas number 7440-30-4 0.85%
cas number of (cl2) - 99.15%
category Inner transition metals 23.73%
crystal structure HCP (hexagonal close packed) 7.63%
density 9.32 g/cm3 0.85%
electronegativity 1.25 (Pauling scale) 0.85%
electronic configuration [Xe] 4f13 6s2 0.85%
electrons 69 0.85%
electrons arrangement 2, 8, 18, 31, 8, 2 0.85%
main isotopes 169Tm 0.85%
melting point 1818 K or 1545 °C or 2813 °F 0.85%
neutrons 100 0.85%
position Group: lanthanides, Period: 6, Block: f 5.08%
rarity ZERO-KELVIN 33.33%
state Solid 72.88%
sublimation point - 99.15%
symbol Tm 0.85%
valence electrons - 61.02%
who discovered Per Teodor Cleve (in 1879) 0.85%

Total Rarity Score: 1992.02

Rarity: #46/354

Thulium

Collection: Bohring Atoms