Which of the following is the correct descending order of atomic radius for the given elements?

Sr>Ca>Mg>Be

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Mg>Br>Ca>Sr

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Be>Sr>Mg>Ca

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Be>Mg>Ca>Sr

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Solution

The correct option is D
Be>Mg>Ca>Sr

All the given elements belong to the second group of the periodic table. Since atomic radius increases down the group due to an addition of new shells. So, the correct order of atomic radius is Be>Mg>Ca>Sr.

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Similar questions

B e^{2 +}

M g^{2 +},

S r^{2 +}

C a^{2 +}

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