Explanation:
Each orbital can only carry at most 2 electrons wih opposite spins.
The first 3 shells are fully filled, giving 9 orbitals.
There is an extra electron in 4s, which gives another orbital. (even though it is not filled yet)
Hence there are 10 orbitals.
Explanation:
This is a neutral beryllium atom
Answer:
C
Explanation:
As long as those numbers are subscripts then that's right
