Ion P^2-

Symbol	P2-
Number	15
Atomic weight	30.9737620
Latin name	Phosphorus
English name	Phosphorus

How to build an electronic configuration by yourself? See link

Electronic configuration of of Phosphorus

P: 1s² 2s² 2p⁶ 3s² 3p³ → P^2-:1s²2s²2p⁶3s²3p⁵

Same electronic configuration has an ion of Phosphorus -2 and S^-1, Cl

The order of filling the shells with electrons of Phosphorus (P^2-): 1s → 2s → 2p → 3s → 3p → 4s → 3d → 4p → 5s → 4d → 5p → 6s → 4f → 5d → 6p → 7s → 5f → 6d → 7p.

On the sub level ‘s’ there might be 2 electrons at most, on ‘p’ - up to 6, on ‘d’ - up to 10 and up to 14 on ‘f’

Phosphorus has 15 electrons, let's fill electronic layers in described order:

2 electrons on 1s-sub level

2 electrons on 2s-sub level

6 electrons on 2p-sub level

2 electrons on 3s-sub level

5 electrons on 3p-sub level

Oxidation state of Phosphorus

Atoms of Phosphorus in compounds have an oxidation state of 5, 4, 3, 2, 1, 0, -1, -2, -3.

The oxidation state is the conditional charge of an atom in a compound: the bond in a molecule between atoms is based on the sharing of electrons, thus, if the atom’s charge virtually increases, then the oxidation state is negative (electrons carry a negative charge), if the charge decreases, then the oxidation state is positive.

Oxidation state of an ion P^2- = -2

Ions of Phosphorus

Valence of P^2-

Atoms of Phosphorus in compounds have valence V, IV, III, II, I.

Valence of Phosphorus is an ability of an atom P to build chemical bounds. The valence is based on electronic configuration of atom: electrons participated in chemical bounds are known as valence electrons. In general the valence is:

The number of possible chemical bounds with other atoms

The valence has no sign.

Quantum numbers P ^2-

Quantum numbers are defined by the last electron in configuration, for an ion P these numbers are N = 3, L = 1, M_l = 0, M_s = -½

Filling an electronic configuration (gif):



Result: