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Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.

e. 11Na,15P,17Cl, 14Si, 12Mg Which of these has largest atoms? 

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11Na,15P,17Cl, 14Si, 12Mg

element an thier electronic configurations:

11Na=2,8,1

15P=2,8,5

17Cl=2,8,7

14Si=2,8,4

 12Mg=2,8,2

The element which has the largest atom is 11Na because atomic size decreases moving across a period from left to the right.

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