Which two particles have approximately the same mass?
(1) proton and neutron
(2) proton and electron
(3) neutron and electron
(4) neutron and positron



Answer :

2 and 3 because a neutron is neutral, a proton is positive, and a electron is negative. So they both have 0 and 1. (neutron and proton or electron)
Curti
The answer is 1)
protons and neutrons almost have the same mass
Both, positrons and electrons are lighter than protons and neutrons

Other Questions