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Assertion: Cu, Ag and Au lie in Group 11...

Assertion: Cu, Ag and Au lie in Group 11 of the periodic table. Hence their atomic radii are in the order `"Cu"ltAgltAu`
Reason: In any group iof the transition elements, the atomic radii increase as we move down the group.

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Verified by Experts

Correct A. The atomic radii are in the order `:`
`Cu lt Ag ~= Au`.
Correct R. Ag and Au have same atomic radii due to the effect of lanthanoide contraction.
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