Question

List - I	List - II
A) No of electrons present in an orbit	1) 2
B) Number of orbitals in an orbit	2) $n$
C) Number of electrons in an orbital	3) $n^2$
D) Number of sub shells in an orbit	4) $2n^2$
	5) $n+1$

The correct match is:

• A. A-4, B-2, C-1, D-3.
• B. A-1, B-2, C-3, D-4.
• C. A-4, B-3, C-1, D-2.
• D. A-5, B-1, C-3, D-4.

Answer 1

The correct option is C A-4, B-3, C-1, D-2.

A) No of electrons present in an orbit $=2n^2$. For example in $n=2$ shell $=2(2{)}^2=8$ electrons. In $2s$ orbital $2$ electrons and in $2p$ orbital $6$ electrons are present.

B) The number of orbitals in an orbit is $n^2$. For $n=2$, there are $2^2=4$ orbitals. 1 s and 3 p orbitals making total = 4.

C) The maximum number of electrons in an orbital is $2$ always.

D) The number of subshells in an orbit is equal to $n$. For example, if n value is $3$, the number of subshells in the third shell is $3$ that is 3s orbital, 3p orbitals, and 3d orbitals.

Thus, $A-4,B-3,C-1,D-2$.

Hence, th correct option is $\text{C}$