Which statement about the mass of subatomic

particles is false?

a) A proton has a mass of 1 amu.

b) A neutron has slightly more mass

than a proton.

C) An electron has slightly less mass

than a proton.

d) none of the above

C

Explanation:

Both proton and neutron have a mass of 1 atomic unit. (proton positive but neutron no charge).

even though they both has a mass of 1 amu, they slightly differ in mass. neutron has slightly greater mass than proton.

but electrons are very smaller than protons and neutrons. electron has 1/1840 mass of proton. so they are very smaller than protons.

answer is C