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The element ‘X’ with atomic number 10 exists as gas, chemically inert and it is high stable. The radius could be measured for X

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covalent radii

vander Waal’s radii

ionic radii

crystal radii

answer is D.

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Detailed Solution

Reason: The element with atomic number 10 is Ne. It is an inert gas with nsଶ np଺ electronic configuration .It is Ne (noble gas) In noble gases vander wall’s radii have been measured. Due to Noble gases do not form covalent bonds.

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