Name: chromium
Symbol: Cr
Atomic number: 24
Atomic weight: 51.9961 (6)
Group in periodic table: 6
Group name:
Period in periodic table: 4
Block in periodic table: d-block
CAS registry ID: 7440-47-3
Chromium is steel-gray, lustrous, hard, metallic, and takes a high polish. Its compounds are toxic. It is found as chromite ore. Siberian red lead (crocoite, PrCrO4) is a chromium ore prized as a red pigment for oil paints.