Ion W^2-

Symbol	W2-
Number	74
Atomic weight	183.8400000
Latin name	Wolframium
English name	Tungsten

How to build an electronic configuration by yourself? See link

Electronic configuration of of Tungsten

W: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁴ → W^2-:1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d⁶

Same electronic configuration has an ion of Tungsten -2 and Ta^-3, Re^-1, Os, Ir⁺¹

The order of filling the shells with electrons of Tungsten (W^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’

Tungsten has 74 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

2 electrons on 4s-sub level

10 electrons on 3d-sub level

6 electrons on 4p-sub level

2 electrons on 5s-sub level

10 electrons on 4d-sub level

6 electrons on 5p-sub level

2 electrons on 6s-sub level

14 electrons on 4f-sub level

6 electrons on 5d-sub level

Oxidation state of Tungsten

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

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 W^2- = -2

Ions of Tungsten

Valence of W^2-

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

Valence of Tungsten is an ability of an atom W 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 W ^2-

Quantum numbers are defined by the last electron in configuration, for an ion W these numbers are N = 5, L = 2, M_l = 3, M_s = -½

Filling an electronic configuration (gif):



Result: