Chemistry S & P Block Elements PMC 2021
PMDC Verified Question 65 of 104
Which of the following element has highest electronegativity?
A
Fluorine
B
Magnesium
C
Sodium
D
Bromine
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Fluorine
Concept:

Electronegativity is an atom's ability to attract a shared pair of electrons in a covalent bond towards itself.

Solution:

  • Electronegativity increases across a period (left to right) and decreases down a group (top to bottom).
  • Fluorine is situated at the top right of the periodic table (excluding noble gases).
  • Because it has an extremely small atomic radius and a high effective nuclear charge, its nucleus exerts immense pull on shared electron pairs.
  • On the Pauling scale, Fluorine is assigned the maximum theoretical value of 4.0, making it the most electronegative element in the entire periodic table.


Why other options are incorrect:

  • Sodium & Magnesium: Are metals on the far left, meaning they are electropositive and have very low electronegativity.
  • Bromine: Is a halogen like Fluorine, but it sits much further down the group, so its larger size drastically reduces its electronegativity.

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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