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Why the size of atom of elements from left to right of period table decrease?

Why the size of atom of elements from left to right of period table decrease? 

Grade:12th pass

2 Answers

Arun
25750 Points
4 years ago
Atomic size gradually decreases from left to right across a period of elements. This is because, within a period or family of elements, all electrons are added to the same shell.
Vikas TU
14149 Points
4 years ago
Dear student 
Electron added to the same cell , will be having more negative charges , This negative charge will be atracted by the positive charge present at nucleus, So the atom will shrink . 
That is why while going from left to right , atomic size decreases.

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