Question

Which of the following particles are of approximately equal mass? (multiple answers)

1:Neutrons

2:Electrons

3:Protons

4:Quarks

Answer 1

electrons and protons ! they have equal number. the atomic number for a element is based on the protons in the element. They must have equal amount !!

Answer 2

Neutrons and Protons are equal in mass (≈ 1amu)