Lithium electron configuration

Li (Lithium) is an element with position number 3 in the periodic table. Located in the II period. Melting point: 180.5 ℃. Density: 0.53 g/cm3.
Electronic configuration of the Lithium atom:
1s2 2s1

Reduced electronic configuration Li:
[He] 2s1

Below is the electronic diagram of the Lithium atom
Orbital diagram of the Lithium atom
Distribution of electrons over energy levels in the Li atom
1-st level (K): 2
2-st level (L): 1
Distribution of electrons in the Lithium

Valence electrons of Lithium

The number of valence electrons in a Lithium atom - 1.
Below are their quantum numbers (N - energy, L - angular momentum, M - magnetic moment, S - spin )
Oxidation states of Lithium: +1
Other elements
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