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Q.

Metallic radius of Ca is 200pm. Covalent radius of Ca is

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a

230 pm

b

200 pm

c

174 pm

d

280 pm

answer is D.

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Detailed Solution

Covalent radius is 20 percent shorter than metallic radius.  

Metallic radius – ‘Ca’ is – 200pm.  Covalent radius of Ca is – 174pm   Note:  vander waals radius > Metallic radius>Covalent radius

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