Ion Hg²⁺

Symbol	Hg2+
Number	80
Atomic weight	200.5920000
Latin name	Hydrargyrum
English name	Mercury

How to build an electronic configuration by yourself? See link

Electronic configuration of of Mercury

Hg: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ → Hg²⁺:1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d⁸

Same electronic configuration has an ion of Mercury +2 and W^-4, Re^-3, Os^-2, Ir^-1, Tl⁺³, Pb⁺⁴, Bi⁺⁵, Po⁺⁶, At⁺⁷

The order of filling the shells with electrons of Mercury (Hg²⁺): 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’

Mercury has 80 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

8 electrons on 5d-sub level

Oxidation state of Mercury

Atoms of Mercury in compounds have an oxidation state of 2, 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 Hg²⁺ = 2

Ions of Mercury

Valence of Hg²⁺

Atoms of Mercury in compounds have valence II, I.

Valence of Mercury is an ability of an atom Hg 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 Hg ²⁺

Quantum numbers are defined by the last electron in configuration, for an ion Hg these numbers are N = 5, L = 2, M_l = 0, M_s = -½

Filling an electronic configuration (gif):



Result: