Table: basic information about and classifications of arsenic.
Name: Arsenic
Symbol: As
Atomic number: 33
Atomic weight: 74.92160 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-38-2
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 4
Block in periodic table: p-block
Colour: metallic grey
Classification: Semi-metallic