Given below are two statements : Statement I : C Statement II : S > Se > Te > Po > O is the correct order in terms of the magnitude of electron gain enthalpy values. In the light of the above statements, choose the correct answer from the options given below :
D. Both Statement I and Statement II are true
Statement I: Ionization enthalpy generally increases across a period from left to right. However, Nitrogen (2s^2 2p^3) has a stable half-filled electronic configuration, making it harder to remove an electron compared to Oxygen (2s^2 2p^4). Thus, the order is C Statement I is true. Statement II: For Group 16 elements, Oxygen has an exceptionally low magnitude of electron gain enthalpy due to its small size and high inter-electronic repulsions in the 2p subshell. The magnitude of electron gain enthalpy decreases down the group from Sulphur onwards. The correct order of magnitude is S > Se > Te > Po > O. Statement II is true. Both statements are correct.
Related: Chemistry — Classification of Elements and Periodicity in Properties · All PYQ Banks