Ion Sn2+
| Symbol | Sn2+ |
| Number | 50 |
| Atomic weight | 118.7100000 |
| Latin name | Stannum |
| English name | Tin |
Electronic configuration of of Tin
Sn: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p2 → Sn2+:1s22s22p63s23p64s23d104p65s24d105p0
Same electronic configuration has an ion of Tin +2 and Cd, In+1, Sb+3, Te+4, I+5, Xe+6
The order of filling the shells with electrons of Tin (Sn2+): 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’
Tin has 50 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
Oxidation state of Tin
Atoms of Tin in compounds have an oxidation state of 4, 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 Sn2+ = 2
Ions of Tin
Valence of Sn2+
Atoms of Tin in compounds have valence IV, II.
Valence of Tin is an ability of an atom Sn 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 Sn 2+
Quantum numbers are defined by the last electron in configuration, for an ion Sn these numbers are N = 4, L = 2, Ml = 2, Ms = -½
Filling an electronic configuration (gif):
Result:
See all elements of the periodic table
Where is Sn in the periodic table?
