Which particle has the weight of a proton but carries no electrical charge?

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Multiple Choice

Which particle has the weight of a proton but carries no electrical charge?

Explanation:
The key idea is mass versus electric charge. The neutron has a mass very close to that of a proton (about 1 atomic mass unit) but carries no electric charge, so it’s electrically neutral. Protons carry a positive charge, electrons carry a negative charge, and a positron has a positive charge like a proton but the same small mass as an electron, not the heavier mass of a proton. So the particle that weighs about a proton and has no charge is the neutron.

The key idea is mass versus electric charge. The neutron has a mass very close to that of a proton (about 1 atomic mass unit) but carries no electric charge, so it’s electrically neutral. Protons carry a positive charge, electrons carry a negative charge, and a positron has a positive charge like a proton but the same small mass as an electron, not the heavier mass of a proton. So the particle that weighs about a proton and has no charge is the neutron.

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