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Number of electrons in Sr^(2+) and Br^(-...

Number of electrons in `Sr^(2+) and Br^(-)` are same, justify whether atomic radii of these two ions will be same or not.

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Although `Sr^(2+) and Br^(-)` have the same number of electrons, their proton number are different. Number of protons in `Sr^(2+)` is greater than that in `Br^(-)`. Thus, nuclear pull on the electrons is greater in `Sr^(2+)` than that in `Br^(-)` so atomic radius or `Sr^(2+)` is less than that of `Br^(-)`.
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