Question

Which of the following is isoelectronic pair?
(a) ICl₂, ClO₂ (b) BrO₂⁻ , BrF₂⁺
(c) ClO₂, BrF (d) CN⁻, O₃

Answer 1

Answer:

option B is isoelectric species

Explanation:

isoelectric means having same number of electrons

BrO2- contain 52 electrons (Br=35, 0=8, one negative charge means one electron extra)

BrF2+ contain 52 electrons (Br=35, F=9, one negative charge means one electron less)

Answer 2

Let us answer it

Explanation:

Isoelectronic pair

They are those members that have same number of electrons in them .

O²⁻,F⁻ etc

In the above question the isoelectronic pair is :(b) BrO₂⁻ , BrF₂⁺

In this both have 52 electrons .

• Let us count for it :

(b) BrO₂⁻

35 + 8x 2 +1 =52

(b) BrF₂⁺

   35 + 9 x 2 -1

   35 +18-1

     = 52