Ion Mn2-
| Symbol | Mn2- |
| Number | 25 |
| Atomic weight | 54.9380440 |
| Latin name | Manganum,Manganesium |
| English name | Manganese |
Electronic configuration of of Manganese
Mn: 1s2 2s2 2p6 3s2 3p6 4s2 3d5 → Mn2-:1s22s22p63s23p64s23d7
Same electronic configuration has an ion of Manganese -2 and Fe-1, Co, Ni+1
The order of filling the shells with electrons of Manganese (Mn2-): 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’
Manganese has 25 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
7 electrons on 3d-sub level
Oxidation state of Manganese
Atoms of Manganese in compounds have an oxidation state of 7, 6, 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 Mn2- = -2
Ions of Manganese
Valence of Mn2-
Atoms of Manganese in compounds have valence VII, VI, V, IV, III, II, I.
Valence of Manganese is an ability of an atom Mn 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 Mn 2-
Quantum numbers are defined by the last electron in configuration, for an ion Mn these numbers are N = 3, L = 2, Ml = -1, Ms = -½
Filling an electronic configuration (gif):
Result:
See all elements of the periodic table
Where is Mn in the periodic table?
