The dand fblock elements - Result Question 82
####82. The lanthanide contraction is responsible for the fact that
[1997]
(a)
(b)
(c)
(d)
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Solution:
- (c) We know that regular decrease in the size of the atoms and ions is called lanthanide contraction. In vertical column of transition elements there is a very small change in size and some times size is found to be same from second member to third member.The similarity in size of the atoms of
and is evident due to the fact of lanthanide contraction. Therefore, and both have same radius .