Arsenic was discovered by Known since ancient times at no data in not known.
Origin of name: from the Greek word "arsenikon" meaning "yellow orpiment".
Atomic Number: 33
Atomic Weight: 74.92160
Melting Point: 1090 K (817°C or 1503°F)
Boiling Point: 887 K (614°C or 1137°F)
Density: 5.776 grams per cubic centimeter
Phase at Room Temperature: Solid
Element Classification: Semi-metal
Period Number: 4 Group Number: 15 Group Name: Pnictogen