Question

question 3
which subatomic particles have approximately the same mass?
○ electrons and atoms
○ protons and neutrons
○ protons and electrons
○ neutrons and electrons

Explanation:

Subatomic particles' masses: protons (~1 atomic mass unit, amu), neutrons (~1 amu), electrons (~0.0005 amu). Atoms are larger than subatomic particles. Thus, protons and neutrons have similar mass.

Answer:

protons and neutrons