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#34 Selenium - rarity SPINNIN'IN
1st ionization energy 9.752 eV 0.85%
appearance Hexagonal selenium is: Metallic-grey,Monoclinic selenium is: Deep red 0.85%
atomic mass 78.971 u 0.85%
atomic number 34 0.85%
atomic radius 190 picometers (van der Waals radius) 0.85%
boiling point 958 K or 685 °C or 1265 °F 0.85%
cas number 7482-49-2 0.85%
cas number of (cl2) - 99.15%
category Nonmetals 2.54%
crystal structure HEX (Hexagonal) 3.39%
density 4.82 g/cm3 0.85%
electronegativity 2.55 (Pauling scale) 1.69%
electronic configuration [Ar] 3d10 4s2 4p4 0.85%
electrons 34 0.85%
electrons arrangement 2, 8, 18, 6 0.85%
main isotopes 80Se 0.85%
melting point 494 K or 221 °C or 430 °F 0.85%
neutrons 45 1.69%
position Group: 16, Period: 4, Block: p 0.85%
rarity SPINNIN'IN 33.33%
state Solid 72.88%
sublimation point - 99.15%
symbol Se 0.85%
valence electrons 6 4.24%
who discovered Jöns Jakob Berzelius and Johann Gottlieb Gahn (In 1817) 0.85%

Total Rarity Score: 2104.82

Rarity: #20/354

Selenium

Collection: Bohring Atoms