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If the length of the body for CaCl which...

If the length of the body for `CaCl` which crystallizes into a cubic strructure with `Cl^(Θ)` ions at the corners and `Cs^(o+)` ions at the centre of the unit cell is `7 Å` and the radius of he `Cs^(o+)` ions is `1.69Å`, what is the radius of `Cl^(ɵ)` ions?

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The correct Answer is:
1.81 Å
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