Chem question... particles with mass

thecomisar
Mon, 28 May 2007 18:56:59 +0000

Which of the following particles has the LEAST mass?

(A) alpha particle
(B) beta particle
(C) proton
(D) neutron
(E) gamma ray

Of the first four, I knew that a beta particle has the least mass, but a gamma ray doesn’t have any mass at all, so I picked E. However, the correct answer is **B/b.

So does a question like that really mean of the particles that HAVE mass, which has the least? Or what?