Question

__ and __ have about the same mass.

a. protons, electrons
b. protons, neutrons
c. electrons, neutrons

Explanation:

In an atom, protons and neutrons are found in the nucleus. Protons have a mass of approximately 1.6726219 × 10⁻²⁷ kg and neutrons have a mass of approximately 1.674927471 × 10⁻²⁷ kg, which are very close. Electrons have a much smaller mass (about 9.10938356 × 10⁻³¹ kg) compared to protons and neutrons.

Answer:

B. protons, neutrons