Ion Ho²⁺

Symbol	Ho2+
Number	67
Atomic weight	164.9303300
Latin name	Holmium
English name	Holmium

How to build an electronic configuration by yourself? See link

Electronic configuration of of Holmium

Ho: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹¹ → Ho²⁺:1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f⁹

Same electronic configuration has an ion of Holmium +2 and Tb, Er⁺³

The order of filling the shells with electrons of Holmium (Ho²⁺): 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’

Holmium has 67 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

9 electrons on 4f-sub level

Oxidation state of Holmium

Atoms of Holmium in compounds have an oxidation state of 3, 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 Ho²⁺ = 2

Ions of Holmium

Valence of Ho²⁺

Atoms of Holmium in compounds have valence III, II.

Valence of Holmium is an ability of an atom Ho 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 Ho ²⁺

Quantum numbers are defined by the last electron in configuration, for an ion Ho these numbers are N = 4, L = 3, M_l = -2, M_s = -½

Filling an electronic configuration (gif):



Result: