Home 33 As Arsenic back to the periodic table

Atomic number   33
Symbol   As
Atomic weight   74.92159
Density [g/cm3]   5.72
Melting point [°C]   613 (subl.)
Boiling point [°C]   --- (subl.)
1st Ionization energy [eV]   9.81
Electronic configuration   [Ar] 3d10 4s2 4p3
Oxidation number (most stable)   5, 3 , 3-
Atomic radius [pm]   124.5
Ionic radius [pm]   58 (3+)
Abundance in crustal rocks [ppm]   1.8
Origin of the name   (greek) arsenikon = name of the mineral
Discovery   known since ancient times
Uses   alloying constituent of lead containing alloys, for the production of semi-conductors (GaAs) as well as for the refining and decoloring of glass.

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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