Question 3 • Physical Science Sem 1 (2003310) BCPS 2026-27
Which statement(s) correctly compare the masses of protons, neutrons, and electrons? Select two options.Protons and neutrons have similar mass.Protons and electrons have similar mass.Neutrons and electrons have similar mass.Protons are smaller than a neutron or an electron.Neutrons are smaller than a proton or an electron.Electrons are smaller than a proton or a neutron.
Answer
A
Protons and neutrons have similar mass.
B
Protons and electrons have similar mass.
C
Neutrons and electrons have similar mass.
D
Protons are smaller than a neutron or an electron.
E
Neutrons are smaller than a proton or an electron.
F
Electrons are smaller than a proton or a neutron.
Explanation
Protons and neutrons have nearly the same mass, about 1 atomic mass unit each, so “Protons and neutrons have similar mass” is correct. An electron has much less mass—about 1/1,836 the mass of a proton—so “Electrons are smaller than a proton or a neutron” is also correct.
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