The dand fblock elements - Result Question 73

####73. Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic numbers).

[2015]

(a) Zr(40) and Nb(41)

(b) Zr(40) and Hf(72)

(c) Zr(40) and Ta(73)

(d) Ti(22) and Zr(40)

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Solution:

  1. (b) Zr(40) and Hf(72) are in the same group

(4). Because of lanthanoid contraction, they have nearly same atomic radii.



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