The mass of a proton is approximately which of the following?
A) 12 g
B) 1 g
C) 12 amu
D) 1 amu

Question

Quizplus · Accepted Answer

The mass of a proton is approximately 1 amu (atomic mass unit). One amu is defined as 1/12th the mass of a carbon-12 atom which is approximately 1.66 x 10^-24 grams. Therefore, the mass of a proton is approximately 1.0073 amu. Choice A is too large, choice B is too small, and choice C is incorrect because the mass of a proton is not exactly 12 amu.

The Mass of a Proton Is Approximately Which of the Following