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In which of the following pairs, the difference between the convalent radii of the two metals is maximum.A. `K, Ca`B. `Mn, Fe`C. `Co, Ni`D. `Cr, Mn`

Answer» Correct Answer - A
Covalent radii decreases on going from left to right in periods. However, among the transition elements the size don not changes much because the electrons add to penultimate d-subshells i.e. `(n-1)` d-subshell.


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