Question

Which of the following CANNOT weigh 1 amu? Why?

a. Atoms because they always weigh more than 1 amu
b. Electrons because they are the lightest subatomic particle
c. Protons because they always weigh more than 1 amu
d. Neutrons because they don't have any mass

Answer 1

Answer: Electrons

Explanation: Electrons are much smaller than Protons and Neutrons. Protons and neutrons each weigh about 1 amu.