Assertion : In hydrogen and hydrogen like species, orbital energy depends only on the quantum number n whereas in multi-electron atoms it depends on quantum numbers n and l.
Reason : The principle quantum number determines the size and the energy of the orbital.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

B

Explanation

The only electrical interaction present in hydrogen and hydrogen like species is the attraction between the negatively charged electron and the positively charged nucleus. In multi-electron atoms, besides this attraction, there is mutual repulsion among the electrons in a multi-electron atoms. Hence energy depends upon n and l both.