7 2 · 5

Nitrogen, N, element 7

Nonmetal· Period 2· Group 15· p-block

Configuration [He]2s²2p³

Atomic weight: 14.007Da
Phase: gas
Density: 0.001145g/cm³
Melting point: 63.15K -210 °C
Boiling point: 77.355K -195.79 °C
Electronegativity: 3.04

Colourless, gaseous element which belongs to group 15 of the periodic table. Constitutes ~78% of the atmosphere and is an essential part of the ecosystem. Nitrogen for industrial purposes is acquired by the fractional distillation of liquid air. Chemically inactive, reactive generally only at high temperatures or in electrical discharges. It was discovered in 1772 by D. Rutherford. 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 nitrogen

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.: 14.007Da; Source: mendeleev
Electron configuration: [He]2s²2p³; Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.: 1s²2s²2p³; Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.: 2 · 5; 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	0.3349	6.6651
2s	3.1526	3.8474
2p	3.166	3.834