Which of the following subatomic particles has a mass of 1.67 × 10^-27 kg?
A) electrons only
B) protons only
C) neutrons only
D) protons and neutrons
E) none of the above
Answer: D
Which of the following subatomic particles has a mass of 1.67 × 10^-27 kg?
A) electrons only
B) protons only
C) neutrons only
D) protons and neutrons
E) none of the above