Periodic table / Other non-metals
7Nitrogen
Nitrogen is an other non-metal in group 15, period 2. At 25 °C it is a gas.
- Symbol
- N
- Atomic number
- 7 protons in the nucleus
- Standard atomic weight
- 14.007 ± 0.001Commercial samples can have a changed isotope mix, because material has been processed or isotopes removed (for example lithium sold after its lithium-6 was taken out).
- Electron configuration
- [He] 2s2 2p3
- Electrons in each shell
- 2, 5
- Group, period, block
- 15, 2, p
- Family
- Other non-metals
- State at 25 °C
- gas
- Electronegativity
- 3.04 (Pauling scale)
- First ionisation energy
- 1402.3 kJ/mol (14.53413 eV)
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Where these numbers come from
Atomic weight: IUPAC CIAAW, abridged standard atomic weights 2024. Electron configuration and ionisation energy: NIST Atomic Spectra Database. Family, state and electronegativity: PubChem. See Sources. Melting points, boiling points and densities are left out for now: published values differ between sources, and we will add them once each has been checked.