HOW MANY OUTER MOST SHELL IN SODIUM
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an atom of sodium has 3 shells ... n =1,2 and 3.
atomic number 11... 1s2 2s2 sp6 3s1
So there is one 1 electron.
atomic number 11... 1s2 2s2 sp6 3s1
So there is one 1 electron.
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