Carbon

Document v1 · published by Koskamo · updated 2026-10-04

Carbon (C) is chemical element 6, a nonmetal in group 14, period 2 (PubChem).

Atomic number: 6
Symbol: C
Group: 14
Period: 2
Atomic mass: 12.011 u
Electron configuration: [He]2s2 2p2
Electronegativity (Pauling scale): 2.55
Atomic radius (van der Waals): 170 pm
Ionization energy: 11.260 eV
Electron affinity: 1.263 eV
Oxidation states: +4, +2, -4
Standard state: Solid
Melting point: 3823 K
Boiling point: 4098 K
Density: 2.2670 g/cm³
Chemical group: Nonmetal
Year discovered: Ancient

Source and provenance

Original source: pubchem.ncbi.nlm.nih.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: PubChem periodic table data (NIH/NLM, pubchem.ncbi.nlm.nih.gov/ptable); group and period from Jefferson Lab via PubChem

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Version history

Published by Koskamo2026-10-04
Version 1