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#68 Erbium - rarity BROWNIAN-MANIACS
1st ionization energy 6.022 eV 1.69%
appearance Silvery white metallic surface 3.39%
atomic mass 167.26 u 0.85%
atomic number 68 0.85%
atomic radius 216 picometers (van der Waals radius) 3.39%
boiling point 3141 K or 2868 °C or 5194 °F 0.85%
cas number 7440-52-0 0.85%
cas number of (cl2) - 99.15%
category Inner transition metals 23.73%
crystal structure HCP (Hexagonal close packed) 5.93%
density 9.06 g/cm3 0.85%
electronegativity 1.23 (Pauling scale) 1.69%
electronic configuration [Xe] 4f12 6s2 0.85%
electrons 68 0.85%
electrons arrangement 2, 8, 18, 30, 8, 2 0.85%
main isotopes 166Er 0.85%
melting point 1802 K or 1529 °C or 2784 °F 0.85%
neutrons 99 0.85%
position Group: lanthanides, Period: 6, Block: f 6.78%
rarity BROWNIAN-MANIACS 33.33%
state Solid 72.88%
sublimation point - 99.15%
symbol Er 0.85%
valence electrons - 61.02%
who discovered Carl Gustaf Mosander (in 1843) 0.85%

Total Rarity Score: 1754.85

Rarity: #86/354

Erbium

Collection: Bohring Atoms