Selenium electron configuration

Se (Selenium) is an element with position number 34 in the periodic table. Located in the IV period. Melting point: 217 ℃. Density: 4.82 g/cm3.
Electronic configuration of the Selenium atom in ascending order of orbital energies:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4

Electronic configuration of the Selenium atom in ascending order of the levels:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4

Reduced electronic configuration Se:
[Ar] 3d10 4s2 4p4

Below is the electronic diagram of the Selenium atom
Orbital diagram of the Selenium atom
Distribution of electrons over energy levels in the Se atom
1-st level (K): 2
2-st level (L): 8
3-st level (M): 18
4-st level (N): 6
Distribution of electrons in the Selenium

Valence electrons of Selenium

The number of valence electrons in a Selenium atom - 6.
Below are their quantum numbers (N - energy, L - angular momentum, M - magnetic moment, S - spin )
OrbitalNLMS
s400+1/2
s400-1/2
p41-1+1/2
p410+1/2
p411+1/2
p41-1-1/2
Oxidation states of Selenium: -2, +2, +4, +6
Сайт "Ваш онлайн"