How to create an atom with a mass number of 3 with a neutral charge

is has three carbons, so the answer is propylamine.

meth-

eth-

prop-

but-

pent-

hex-

hept-

oct-

non-

explanation:

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

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.

b.false that your answer