Ion Li^- (Minus one)

Symbol	Li-
Number	3
Atomic weight	6.9380000
Latin name	Lithium
English name	Lithium

How to build an electronic configuration by yourself? See link

Electronic configuration of of Lithium

Li: 1s² 2s¹ → Li^-:1s²2s²

Same electronic configuration has an ion of Lithium -1 and Be, B⁺¹, C⁺², N⁺³

The order of filling the shells with electrons of Lithium (Li^-): 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’

Lithium has 3 electrons, let's fill electronic layers in described order:

2 electrons on 1s-sub level

2 electrons on 2s-sub level

Oxidation state of Lithium

Atoms of Lithium in compounds have an oxidation state of 1, -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 Li^- = -1

Ions of Lithium

Valence of Li^-

Atoms of Lithium in compounds have valence I.

Valence of Lithium is an ability of an atom Li 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 Li ^1-

Quantum numbers are defined by the last electron in configuration, for an ion Li these numbers are N = 2, L = 0, M_l = 1, M_s = -½

Filling an electronic configuration (gif):



Result: