Chemical element · Atomic number 7
Nitrogen
Nitrogen in the periodic table: atomic number 7, electron configuration, atomic mass, physical data, oxidation states, media credit and visible sources.
Nonmetal
gaseous
14.007 u
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Atomic classification
Shell occupancy
Nitrogen in the Bohr shell model
This shows the electron distribution of the neutral atom in a simplified shell model.
- K · n=1
- 2 electrons
- L · n=2
- 5 electrons
- Electron configuration
- [He] 2s2 2p3
- Electrons per shell
- 2 · 5
- Group
- 15
- Period
- 2
- Block
- P
- Element category
- Nonmetal
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Physical and chemical properties
- Atomic mass
- 14.007 u
- Standard state
- gaseous
- Density
- 0.0012506 g/cm³
- Melting point
- 63.15 K
- Boiling point
- 77.36 K
- Electronegativity
- 3.04 (Pauling)
- First ionisation energy
- 14.534 eV
- Oxidation states
- +5, +4, +3, +2, +1, -1, -2, -3
- Discovery
- 1772
Safety and periodic classification
Safety
Safe handling cannot be inferred from Nitrogen's position in the periodic table alone. Laboratory, classroom and disposal decisions must follow the documentation for the exact material and its safety data sheet.
Position and comparison
Nitrogen is in period 2, group 15 and the P block. Its direct neighbours by atomic number are Carbon and Oxygen. The recorded Pauling electronegativity is 3.04. Periodic trends are compared only through the separately sourced neighbouring values.
Sources and scope
PubChem attributes element data to sources including IUPAC, NIST and IAEA. Quanta stores the referenced snapshot locally and leaves unknown values unavailable.