15 2 · 8 · 5

Phosphorus, P, element 15

Nonmetal· Period 3· Group 15· p-block

Configuration [Ne]3s²3p³

Atomic weight: 30.9738Da
Phase: solid
Density: 1.823g/cm³
Melting point: 317.3K 44.2 °C
Boiling point: 553.65K 280.5 °C
Electronegativity: 2.19

Non-metallic element belonging to group 15 of the periodic table. Has a multiple allotropic forms. Essential element for living organisms. It was discovered by Brandt in 1669. 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

5 of 5 fields have a value for phosphorus

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.: 30.97376Da; Source: mendeleev
Electron configuration: [Ne]3s²3p³; Source: mendeleev
Uncertainty of the atomic weight: 5×10⁻⁹Da; Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.: 1s²2s²2p⁶3s²3p³; Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.: 2 · 8 · 5; Source: Worked outfrom electron configuration

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	0.4422	14.5578
2s	5.175	9.825
2p	4.0388	10.9612
3s	9.3582	5.6418
3p	10.1136	4.8864