Question

Atoms may be regarded as comprising of protons , neutrons and electrons. If the mass attributed to a neutron be halved and electron were doubled , calculate the mass of 12 C 6​

Answer 1

Answer:

be reduced approximately by 25%

Mass of a atom =mass of proton+mass ofneutron

As mass of electron is very less compare to neutron and proton.

So if mass of neutron is halved then total mass of

12

C=6p+

2

6n

=9

∴ % decrease in mass of atom =

12

3

×100=25 %