Which subatomic particles each have a mass of approximately 1 u?

August 2018 NY Regents Chemistry Exam

3 Which subatomic particles each have a mass of approximately 1 u? (1) proton and electron

(2) proton and neutron

(3) neutron and electron

(4) neutron and positron

Solution: Protons and neutrons each have a mass of approximately 1 u

Answer: 2

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