Selenium: 1s2 2s22p6 3s23p63d10 4s2 4p4
Select an orbital to view:
Lowest energy level:
1s : 2 electrons
Second energy level:
2s : 2 electrons
2p : 6 electrons
Third energy level:
3s : 2 electrons
3p : 6 electrons
3d : 10 electrons
Fourth energy level:
4s : 2 electrons
4p : 4 electrons