Europium electron configuration

Eu (Europium) is an element with position number 63 in the periodic table. Located in the VI period. Melting point: 822 ℃. Density: 5.25 g/cm3.
Electronic configuration of the Europium atom in ascending order of orbital energies:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f7

Electronic configuration of the Europium atom in ascending order of the levels:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f7 5s2 5p6 6s2

Reduced electronic configuration Eu:
[Xe] 4f7 6s2

Below is the electronic diagram of the Europium atom
Orbital diagram of the Europium atom
Distribution of electrons over energy levels in the Eu atom
1-st level (K): 2
2-st level (L): 8
3-st level (M): 18
4-st level (N): 25
5-st level (O): 8
6-st level (P): 2
Distribution of electrons in the Europium
Oxidation states of Europium: +2, +3
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