The sum of protons, electrons and neutrons in the heaviest …

Chemistry Hydrogen and Its Compounds ( Not in Syllabus ) Hydrogen Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

The sum of protons, electrons and neutrons in the heaviest isotope of hydrogen is

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The correct answer is:

has 3 nucleons (1 proton + 2 neutrons) and one electron so sum of these is 3 + 1 = 4.

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