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need an explanation for question no. 9 to why it cannot be atomic no. 38
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need an explanation for question no. 9 to why it cannot be atomic no. ...
Because...element having 38 as atomic no. can't have similar chemical properties as calcium . beacuse it has 4 valence electron in outermost shell whereas calcium has 2 valence electron in the outermost shell

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need an explanation for question no. 9 to why it cannot be atomic no. 38 Related: NCERT Solutions - Periodic Classification of Elements?
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