Ask your own question, for FREE!
Physics 9 Online
OpenStudy (anonymous):

An atom’s mass number equals the number of??? please help

OpenStudy (anonymous):

protons & neutrons presents inside the nucleus E.g.sodium nucleus have 11 proton and 12 neutron so mass is 23

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!