Helium electron configuration

He (Helium) is an element with position number 2 in the periodic table. Located in the I period. Melting point: -272.2 ℃. Density: 0.00017 g/cm3.
Electronic configuration of the Helium atom:

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

Valence electrons of Helium

The number of valence electrons in a Helium atom - 2.
Below are their quantum numbers (N - energy, L - angular momentum, M - magnetic moment, S - spin )
Other elements
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