The mass of a positron is
A) equal to the mass of an electron.
B) more than the mass of an electron but less than the mass of a proton.
C) equal to the mass of a proton.
D) more than the mass of a proton.

Question

Quizplus · Accepted Answer

A positron is the antiparticle of an electron and has the same mass as an electron, which is approximately 9.11 x 10^-31 kg. Therefore, choice A is the correct answer. Choice B is incorrect because a proton has a much greater mass than both an electron and a positron. Choice C is incorrect because the mass of a proton is much greater than the mass of an electron or positron. Choice D is incorrect because it suggests that the mass of a positron is greater than a proton, which is not true.

The Mass of a Positron Is