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Atomic Number	33

Atomic Symbol	As

Atomic Weight	74.92159 amu

Group	Metalloid, 15

Form	Solid

Density @ STP	5.75 g/cm³

Melting Point	817 °C (triple point) (1502.6 °F, 1090.15 °K)

Boiling Point	614 °C (sublimation point) (1137.2 °F, 887.15 °K)

Heat of Fusion	24.44 kJ/mol

Heat of Vaporization	32.4 kJ/mol

First Ionization Potential	9.8152 eV

Electronegativity (on Pauling scale	2.18

Specific Heat Capacity	0.329 J/g K

Ground State Electron Configuration	4p³

Oxidation State(s)	+3, +5, -3

Stable Isotopes and Natural Abundance on Earth	⁷⁵As, 100%

Selected Radioisotopes	⁷²As, ⁷³As, ⁷⁴As

Atomic Radius	114 pm

Crystal Structure	Trigonal