Carbon

Uses	Formation of fossil fuels • Photovoltaic cells • Purification materials • Semiconductors • Batteries • Carbon credits
Block	p-block
Group	Carbon group
Period	Period 2
Symbol	C
Allotropes	Graphite • Diamond • Carbon nanotube • Graphene
CAS number	7440-44-0
Properties	Nonmetal • Tetravalent • Tetrahedral • Allotropic • Versatile element
Phase at STP	Solid
Atomic number
Natural isotopes	Carbon-12 (98.93%) • Carbon-13 (1.07%)
Electron configuration	He 2s^2 2p^2