Chemistry-
General
Easy
Question
In which of the following pairs the difference between the covalent radii of the two metals is maximum
- (a) K, Ca
- Mn , Fe
- (c) Co , Ni
- Cr , Mn
The correct answer is: (a) K, Ca
Covalent radii decreases on going from left to right in periods. However among the transition elements the size do not changes much because the electrons add to the pneultimate d-subshells i.e. 
subshell.
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