Definition	From 'arsenikos' or mole.A semimetallic elementnoted for being poisonous although some of its compounds are medicinal.
Discovery	1250 by albertus magnus of germany
Uses	hardenic chots, laser materials, poisons
Group of Elements	Metalloids(Solid)
Atomic Weight	74.92160
Oxidation State	+3,5
Melting Point	817
Boiling Point	613
Density	5.72 g/cm3
Electronegativity	2.0