Ion Mo^2-

Symbol	Mo2-
Number	42
Atomic weight	95.9500000
Latin name	Molybdaenum
English name	Molybdenum

How to build an electronic configuration by yourself? See link

Electronic configuration of of Molybdenum

Mo: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁵ → Mo^2-:1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹4d⁷

The same amount of electrons as an ion of Molybdenum -2 have: Tc^-1

The order of filling the shells with electrons of Molybdenum (Mo^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’

Molybdenum has 42 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

1 electron on 5s-sub level

7 electrons on 4d-sub level

Oxidation state of Molybdenum

Atoms of Molybdenum 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 Mo^2- = -2

Ions of Molybdenum

Valence of Mo^2-

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

Valence of Molybdenum is an ability of an atom Mo 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 Mo ^2-

Quantum numbers are defined by the last electron in configuration, for an ion Mo these numbers are N = 4, L = 2, M_l = -1, M_s = -½

Filling an electronic configuration (gif):



Result: