Ion Co⁵⁺

Symbol	Co5+
Number	27
Atomic weight	58.9331940
Latin name	Cobaltum
English name	Cobalt

How to build an electronic configuration by yourself? See link

Electronic configuration of of Cobalt

Co: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷ → Co⁵⁺:1s²2s²2p⁶3s²3p⁶4s²3d²

Same electronic configuration has an ion of Cobalt +5 and Ti, V⁺¹, Mn⁺³, Fe⁺⁴, Ni⁺⁶

The order of filling the shells with electrons of Cobalt (Co⁵⁺): 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’

Cobalt has 27 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

2 electrons on 3d-sub level

Oxidation state of Cobalt

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

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 Co⁵⁺ = 5

Ions of Cobalt

Valence of Co⁵⁺

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

Valence of Cobalt is an ability of an atom Co 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 Co ⁵⁺

Quantum numbers are defined by the last electron in configuration, for an ion Co these numbers are N = 3, L = 2, M_l = -1, M_s = +½

Filling an electronic configuration (gif):



Result: