i think its 4.
4
s subshell have energy more than d subshell
The 3s subshell is farther from the nucleus
Two electrons can occupy the 2s subshell, and 8 electrons can occupy the 3d subshell.
4f subshell has the highest energy. A f subshell has the highest energy among all the subshells in any shell.
the total number of subshell for a sodium atom is 4.
d subshell = 2 p subshell = 6
s subshell have energy more than d subshell
For a 2s subshell to be present, the 1s subshell must first be full, which means no more electrons can be moved into the 1s subshell.
The 3s subshell is farther from the nucleus
Two electrons can occupy the 2s subshell, and 8 electrons can occupy the 3d subshell.
It is 's' subshell.
You can tell the difference between 1s subshell and 3s subshell using quantum numbers and electron configuration.
the f subshell
4f subshell has the highest energy. A f subshell has the highest energy among all the subshells in any shell.
the total number of subshell for a sodium atom is 4.
number of l
it is just a quantum property, its further away from the nucleus