Chemistry S & P Block Elements SZABMU 2022
PMDC Verified Question 52 of 104
Which of the following property decreases in group 2 as we go down the group?
A
Shielding
B
Atomic radius
C
Proton number
D
Ionization energy
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Ionization energy
Concept:

As we move down a group in the periodic table, the addition of new electron shells increases the distance between the nucleus and the valence electrons.

Solution:

  • Down Group 2, the atomic radius increases.
  • This larger size, combined with the increased shielding effect from inner shell electrons, weakens the electrostatic hold of the nucleus on the outermost electrons.
  • Because the valence electrons are held less tightly, less energy is required to remove them.
  • Therefore, Ionization energy decreases down the group.


Why other options are incorrect:

  • Shielding, Atomic radius, & Proton number: All of these consistently increase as you move down any group.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Previous Question All S & P Block Elements MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App