Question

First number of each of the groups 1, 2, 13-17 differ in many respects from other members of their
respective groups because of
i) small size
ii) high electronegativity iii) absence of d-orbitals in valence shell
iv) absence of isotopes
1) i & ii
2) iii
3) i, ii & iii
4) i, ii, iii & iv

please help me
no spams​

Answer 1

Answer:

Correct options are A) , B) and C)

Explanation:

The first element of each of group in s and p-block except noble gases differ in many aspects from the other members of their respective group.This propert is called as ANOMALOUS Property , because of the following reasons.

A) The smaller size of the first element .

B) The higher electronegativity and higher ionization potential of the first element.

C) The unavailability of d-orbitals  in the first element.

D) But not because of the higher shielding effect.

    Hence option A,B & C are correct.

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