In a transition series, as the atomic number increases, paramagnetism : — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Paramagnetism in transition metal atoms or ions is directly related to the number of unpaired electrons in their d-subshells. Step 2: As the atomic number increases across a transition series, the d-orbitals are filled singly up to a d5 configuration (maximum of 5 unpaired electrons), after which pairing begins, reducing the number of unpaired electrons to zero at d10. Step 3: Consequently, the number of unpaired electrons (and thus the magnetic moment) first increases to a maximum and then decreases, matching option (c).