It is 2p. Because the electron configuration for oxygen is 1s2 2s2 2p4, therefore 2p being the greatest or highest energy level
helium has only one energy level (with 2 electrons in it).
helium has only 1 energy level with 2 electrons
1
He-1
more precisely, 1s
only 2 electrons
1S
q
2s
one
The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
The highest occupies energy level in aluminum is the 3rd energy level. Its electron configuration is 1s22s22p63s23p1.
4
Eight.
3
The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
Sr has two electrons in the highest occupied energy level
1s
2
2s2
The highest occupies energy level in aluminum is the 3rd energy level. Its electron configuration is 1s22s22p63s23p1.
Third energy level
the period number tells which is the highest energy level occupied by the electrons
4
2s
8
Eight.