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 magnetic orbital quantum number determines the size of an orbital. Reason (R) : For a given azimuthal quantum number ( l ), the magnetic orbital quantum number can have ( 2l + 1 ) values, each representing a specific spatial orientation. In the light of the above statements, choose the most ap
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
D. (A) is not correct but (R) is correct
Step-by-step solution
Assertion (A) is not correct because the size of an orbital is primarily determined by the principal quantum number ( n ). The magnetic orbital quantum number ( m_l ) determines the spatial orientation of the orbital. Reason (R) is correct because for a given subshell defined by the azimuthal quantum number l , there are ( 2l + 1 ) possible integer values of m_l ranging from -l to +l . Each of these values corresponds to a specific spatial orientation of the orbital in a magnetic field. Therefore, (A) is not correc