The valence electron configuration of selenium is 4s2 4p4, meaning it has 6 valence electrons.
Se2- 1s22s22p63s23p64s23d104p6
The electron configuration of selenium (Se) is [Ar] 3d10 4s2 4p4. To form a 2- ion, two electrons will be removed from the outermost shell, which is the 4p subshell. Therefore, the electron configuration of Se2- is [Ar] 3d10 4s2.
[Kr]
Selenium: [Ar] 3d10 4s2 4p4 or 2, 8, 18, 6 Phosphorus: [Ar] 3d10 4s2 4p3 or 2, 8, 18, 5
The abbreviated electron configuration of sodium is [Ne]3s1.
The abbreviated electron configuration of lithium is [He] 2s1.
The electron configuration of boron is [He]2s2.2p1.
The electron configuration of selenium is [Ar]3d10.4s2.4p4.
The valence electron configuration of selenium is 4s2 4p4, meaning it has 6 valence electrons.
The abbreviated electron configuration for argon is [Ne] 3s^2 3p^6. The [Ne] represents the electron configuration of the noble gas neon, which has the same electron configuration as the inner electrons of argon.
Se2- 1s22s22p63s23p64s23d104p6
The abbreviated electron configuration of oxygen is [He] 2s^2 2p^4.
The electron configuration of selenium (Se) is [Ar] 3d10 4s2 4p4. To form a 2- ion, two electrons will be removed from the outermost shell, which is the 4p subshell. Therefore, the electron configuration of Se2- is [Ar] 3d10 4s2.
[Kr]
Selenium: [Ar] 3d10 4s2 4p4 or 2, 8, 18, 6 Phosphorus: [Ar] 3d10 4s2 4p3 or 2, 8, 18, 5
The electron configuration of nobelium is [Rn]5f14.7s2.