6 2 · 4

Carbon, C, element 6

Nonmetal· Period 2· Group 14· p-block

Configuration [He]2s²2p²

Atomic weight: 12.011Da
Phase: solid
Density: 2.2g/cm³
Melting point: 3,823K 3,550 °C
Boiling point: 4,098.15K 3,825 °C
Electronegativity: 2.55

Carbon is a member of group 14 of the periodic table. It has three allotropic forms of it, diamonds, graphite and fullerite. Carbon-14 is commonly used in radioactive dating. Carbon occurs in all organic life and is the basis of organic chemistry. Carbon has the interesting chemical property of being able to bond with itself, and a wide variety of other elements. Description from mendeleev.

Back to the table

The outermost shell: the valence electronsThe inner shellsThe nucleus One bead for each electron, on the ring of its shell, counted from the nucleus out. The rings turn at their own pace; the model is Bohr's picture of the atom, which places electrons in shells but not on true orbits.

Atomic properties

4 of 5 fields have a value for carbon

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.: 12.011Da; Source: mendeleev
Electron configuration: [He]2s²2p²; Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.: 1s²2s²2p²; Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.: 2 · 4; Source: Worked outfrom electron configuration

No data uncertainty of the atomic weight.

Screening of each subshell

Clementi's screening constants: how much of the nucleus's charge the other electrons hide from an electron in each subshell. What is left is the effective nuclear charge it feels.

Subshell	Screening σ	Effective charge Z − σ
1s	0.3273	5.6727
2s	2.7834	3.2166
2p	2.8642	3.1358