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

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

it is the most commonly accepted one