Statement 1: 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.
Statement 2 : The principal quantum number determine the size and the energy of the orbital.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of(A).
B. If both (A) and (R) are correçt, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

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 multi-electron atoms. Hence energy depends upon n and/both.