As	Z =  33	◊ ◊ ◊ ◊ ◊	Arsenic
			From the Greek "arsenikon", meaning "orpiment"
(AM) Atomic Mass	74.92159  amu	♦	Oxidation States	+3, +5, -3
(BP) Boiling Point	613  °C	♦	(MP) Melting Point	817  °C
(ρ) Density	5.72  g/cm3	♦	Crystal Structure	Rhombohedral
( χ ) Electronegativity	2	♦	(AR) Atomic Radius	1.19  Å
Physical State	Solid	♦	(C) Heat Capacity	0.329  J/g °C
Electronic-Config	[Ar]  3d10  4s2  4p3	♦	(I1) First Ionization E	946.52  kJ/mol
(ΔHvap) Heat of Vaporization	32.4  kJ/mol	♦	(ΔHfus) Heat of Fusion	24.44  kJ/mol
Year of Discovery	Known to the Ancients	♦	Location of Discovery	n/a
(E°) Standard Potential	H3AsO4 + 3 H+⇔ As + 3 H2O (0.250 V),  As + 3 H+⇔ AsH3 (-0.600 V)
Stable isotopes	75As
Discovered/Synthesized by	Known since ancient times
Natural Source	The mineral/ore arsenopyrite
Common Uses	Poisons, semiconductors, light-emitting diodes, signal lights, tiny lasers
Other Info	One of the most popular poisons throughout the ages Some bacteria may use arsenic in place of phosphorus.
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