Assertion. Only principal quantum number determines the energy of an electron in an orbital of Na atom. Reason. For one electron system, the expression of energy is quite different from that obtained in Bohr's theory.

Assertion. Only principal quantum number determines the energy of an e

1.	Assertion. Only principal quantum number determines the energy of an electron in an orbital of Na atom. Reason. For one electron system, the expression of energy is quite different from that obtained in Bohr's theory.
Answer» If both ASSERTION and reason are TRUE, and reason is the true explanation of the arrertion If both assertion and reason are true, but reason is not the true explanation of the assertional If assertion is true, but reason is false If both assertion and reason are false Solution :Correct A. To find the energy of an electron in an orbital, both PRINCIPAL and azimuthal quantum numbers are required. Correct R. For one electron SYSTEM, the expression of energy is same as that obtained in Bohr's theory