Praxis 5005 Practice Test Practice Question
Of the following, which is the smallest particle in an atom?
Correct Answer: B
Rationale: Electrons are the smallest particles in an atom, with a mass approximately 1/1836 that of a proton or neutron. Protons and neutrons, found in the nucleus, are much larger and more massive, making option A (Proton) and option C (Neutron) incorrect. The nucleus itself, option D, is composed of protons and neutrons, thus it is not a single particle but rather a collection of them. Therefore, among the options, electrons stand out as the smallest fundamental particles in an atom.
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