Ion S^2-

Symbol	S2-
Number	16
Atomic weight	32.0590000
Latin name	Sulfur, Sulphur
English name	Sulfur

How to build an electronic configuration by yourself? See link

Electronic configuration of of Sulfur

S: 1s² 2s² 2p⁶ 3s² 3p⁴ → S^2-:1s²2s²2p⁶3s²3p⁶

Same electronic configuration has an ion of Sulfur -2 and Si^-4, P^-3, Cl^-1, Ar, K⁺¹, Ca⁺², Sc⁺³, Ti⁺⁴, V⁺⁵, Mn⁺⁷

The order of filling the shells with electrons of Sulfur (S^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’

Sulfur has 16 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

6 electrons on 3p-sub level

Oxidation state of Sulfur

Atoms of Sulfur in compounds have an oxidation state of 6, 5, 4, 3, 2, 1, 0, -1, -2.

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 S^2- = -2

Ions of Sulfur

Valence of S^2-

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

Valence of Sulfur is an ability of an atom S 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 S ^2-

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

Filling an electronic configuration (gif):



Result: