Question

this is an example of an \s\ orbital. how many s orbitals can exist in an energy level?
1
5
7
3

Explanation:

Orbitals are defined by quantum numbers. For s orbitals, the azimuthal quantum number $l=0$. The magnetic quantum number $m_l$ can only take values from $-l$ to $+l$. When $l=0$, $m_l$ has only one possible value ($0$), meaning only one s orbital exists per energy level.

Answer:

1