Question

The smallest (by mass) of the subatomic particles is the electron.
a. True
b. False

Answer 1

A.true;the electron has the smallest mass of the three "standard" atomic particles.

Answer 2

For the atom the answer is true. Electrons are quite smaller than both neutrons and protons. How ever there are some sub atomic particles smaller. I think an example of one is a quark. You might want to google this question, reading about subatomic particles is relatively interesting. I hope this helps.