Question

an atom has 3 electrons , 3 protons and 4 neutrons. What is the atomic number and mass number

Answer 1

Atomic no. Is 3 and mass no. is 7

Answer 2

Hi dear !!!

mass number. = number of proton + number of neutron



=> 3+ 4 = 7

and

atomic number = number of electron = 3




hope it help you dear !!!


thanks !!!