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 2d subshell is not possible in any atom. Reason (R): For a given principal quantum number n , the azimuthal quantum number l can have values from 1 to n only. 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
C. (A) is correct but (R) is not correct
Step-by-step solution
Assertion (A) states that the 2d subshell is not possible. For a d subshell, the azimuthal quantum number l = 2 . If n = 2 , the possible values for l are 0 and 1 . Since l cannot be 2 when n = 2 , the 2d subshell does not exist. Therefore, Assertion (A) is correct. Reason (R) states that l can have values from 1 to n . This is incorrect. According to quantum mechanical rules, for a given principal quantum number n , the azimuthal quantum number l can have integer values ranging from 0 to (n-1) . Therefore, Reason