Chemistry ^.^

Hi there


Can someone please show me how to draw a fully labelled diagram of atoms such as:

He ( the proton number at the top is 4 and the atomic mass at the bottom is 2)

I now that it would have protons and neutrons in it and the electrons would be outside

But how many shells would I draw and what wolud it look like?


Thanks I really appreciate

http://images.google.com/images?svnum=10&um=1&hl=en&lr=&q=helium+atom

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