Ion F^- (Minus one)

Symbol	F-
Number	9
Atomic weight	18.9984032
Latin name	Fluorum
English name	Fluorine

How to build an electronic configuration by yourself? See link

Electronic configuration of of Fluorine

F: 1s² 2s² 2p⁵ → F^-:1s²2s²2p⁶

Same electronic configuration has an ion of Fluorine -1 and C^-4, N^-3, O^-2, Ne, Na⁺¹, Mg⁺², Al⁺³, Si⁺⁴, P⁺⁵, S⁺⁶

The order of filling the shells with electrons of Fluorine (F^-): 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’

Fluorine has 9 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

Oxidation state of Fluorine

Atoms of Fluorine in compounds have an oxidation state of 0, -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 F^- = -1

Ions of Fluorine

Valence of F^-

Atoms of Fluorine in compounds have valence I.

Valence of Fluorine is an ability of an atom F 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 F ^1-

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

Filling an electronic configuration (gif):



Result: