NEETChemistryStructure of Atom
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The maximum number of electrons that can be accommodated in the subshell with n=5 and l=3 is 14 . Reason (R) : The quantum numbers n=5 and l=3 represent the 5f subshell, which contains 7 orbitals. In the light of the above statements, choose the most appropriate answer from the options given below
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
The principal quantum number n=5 and the azimuthal quantum number l=3 correspond to the 5f subshell. The number of orbitals in a subshell is given by the formula 2l + 1 . For l=3 , the number of orbitals is 2(3) + 1 = 7 . Thus, Reason (R) is correct. Since each orbital can accommodate a maximum of 2 electrons with opposite spins, a subshell with 7 orbitals can hold a maximum of 7 2 = 14 electrons. Thus, Assertion (A) is correct. Reason (R) directly explains why the maximum electron capacity is 14 by stating the num