Trivia Question 19
Which one(s) of the following particles does(do) not have an anti-matter counterpart?
A. Proton
B. Photon
C. Electron
D. Neutron
Trivia Question 19
Which one(s) of the following particles does(do) not have an anti-matter counterpart?
A. Proton
B. Photon
C. Electron
D. Neutron