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Question
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
Solution
In the two given options, species X and Y represents the same element magnesium. X is magnesium atom and Y is magnesium ion. Out of Mg and Mg2+ ion Mg atom would be larger as the number of energy shells in Magnesium atom is three while the number of energy shells in magnesium ion is two.
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