heavy and light nuclei

[winnie101]

why do lighter nuclei have the same number of protons and neutrons, while heavier nuclei have more neutrons than protons?

[Deadly_king]

why do lighter nuclei have the same number of protons and neutrons, while heavier nuclei have more neutrons than protons?

I don't think we really need to know about this at A-level. So I'll suggest that you don't worry about it for the time being.

However if you really need to know about it. Here are some links. But I warn you that it's quite a long theory and you'll have much reading to do. 

http://www.eng.fsu.edu/~dommelen/quantum/style_a/nti.html

http://galileo.phys.virginia.edu/classes/252/Nuclear_Notes/nuclear_notes.html

[winnie101]

Thanks
no im not studying it in detail, our teacher just told us to think about it and find some kind of ans to it.

[Deadly_king]

Thanks
no im not studying it in detail, our teacher just told us to think about it and find some kind of ans to it.

Yupz.......good decision.

Actually thinking about it won't hurt........but going through all of it might confuse you even more if you're not very good in that topic.