Chemistry S & P Block Elements BUMHS 2022
PMDC Verified Question 56 of 104
Select the group whose elements easily lose electron.
A
IA
B
VA
C
VIA
D
VIIA
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: IA
Concept:

The tendency to lose electrons (metallic character) is highest for elements with the largest atomic radii and the lowest ionization energies.

Solution:

  • Elements in Group I-A (Alkali metals) are located at the extreme left of the periodic table.
  • They have the largest atomic sizes in their respective periods.
  • Because the single valence electron (\( ns^1 \)) is far from the nucleus and heavily shielded, it experiences very weak effective nuclear charge.
  • Therefore, Group I-A elements have the lowest ionization energies and lose their valence electron most easily.


Why other options are incorrect:

  • Groups VA, VIA, & VIIA: These are non-metals located on the right side of the periodic table. They have small sizes, high ionization energies, and a strong tendency to gain electrons, not lose them.

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.

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