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Arsenic (As): Fun Facts and Information About the Element

What is the symbol? As
What is the atomic number? 33
What is the atomic weight? 74.9216
What is the melting point in Celsius? 81
What is the boiling point in Celsius? 613
What is the density (g/cm3)? 5.72
What year was it discovered? ancient
Who discovered the element? Known since ancient times
What group is the element in? 15
What is the electron configuration? [Ar] 3d10 4s2 4p3
What is the ionization energy? 9.7886
What element category is it in? Metalloids

Where is Arsenic Look Like?

The element is a steel gray, very brittle, crystalline, semi-metallic solid; it tarnishes in air, and when it is heated it rapidly oxidizes to arsenous oxide, which smells of garlic. Arsenic and its compounds are poisonous.

What is Arsenic Used For?

Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot. The most important compounds are white arsenic, the sulfide, Paris green, calcium arsenate, and lead arsenate; the last three have been used as agricultural insecticides and poisons. Marsh’s test makes use of the formation and ready decomposition of arsine. Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors. Gallium arsenide is used as a laser material to convert electricity directly into coherent light.