an element has electronic configuration 2 8 18 1


An element has electronic configuration 2, 8, 18, 1. If its atomic weight is 63, then how many neutrons will be present in its nucleus:

(1) 30     

(2) 32     

(3) 34    

(4)33

ans: 34

 

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Chemistry: an element has electronic configuration 2 8 18 1
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