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3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
In which of the following pairs the difference between the covalent radii of the two metals is maximum
  • ✓
    $K, Ca$
  • B
    $Mn , Fe$
  • C
    $Co , Ni$
  • D
    $Cr , Mn$
✓

Answer

Correct option: A.
$K, Ca$
a
(a) 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. $(n - 1)\,d{\rm{ - }}$subshell.

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