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An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass?

O the neutron and the electron
O the proton and the electron
O the proton and the neutron
O the neutron and the atom

User Junius L
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2 Answers

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The proton and electron
User Jason Stallings
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Answer:

the pro on and the electron

User Jorge Pedret
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