Basic Information

Name:arsenic

Symbol:ar

Classification:Arsenic is a metalloid

color:gray

Atomic weight : 74.9216

state: solid

Melting Point: 817 oC, 1090 K

Boiling Point: 614 oC, 887 K

Shells:2,8,18,5

Electron configuration:[Ar] 3d10 4s2 4p3

Density @ 20oC:5.776 g/cm3

Atomic volume:12.97 cm3/mol

Structure: rhombohedral; layers of 6-member rings

3.5 mohs