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CHEMISTRY

JAMB 2005 - Question 30

Chemistry 2005 JAMB Past Questions - Question 30: The component of an atom that contributes least to its mass is the

Choose the correct answers from the options given.

The component of an atom that contributes least to its mass is the

A: proton

B: nucleus

C: neutron

D: electron

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Correct Answer

Explanation

The component of an atom that contributes least to its mass is the electron. Electrons are subatomic particles that orbit the nucleus of an atom. While protons and neutrons are located in the nucleus and contribute significantly to the mass of the atom, electrons are much smaller in mass. In fact, the mass of an electron is about 1/1836 times the mass of a proton or neutron. As a result, electrons make a negligible contribution to the overall mass of an atom.