Answer: 1. 6 Key idea: the radius ratio decides the coordination number. r_+/r_-=0.98/1.81=0.54 This lies in 0.414-0.732, which means octahedral voids, so the coordination number is 6 for each ion (option 1).

Topic: Ionic bonding and lattice enthalpy· Chemical Bonding and Molecular Structure

The ionic radii of A^+ and B^- ions are 0.98×10^-10 m and 1.81×10^-10 m. The coordination number of each ion in AB is :

1. 6

2. 4

3. 8

4. 2

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 neet Save WhatsApp Report

1 answer

Best answer

Answer: 1. 6

Key idea: the radius ratio decides the coordination number.

$$\frac{r_+}{r_-}=\frac{0.98}{1.81}=0.54$$

This lies in 0.414-0.732, which means octahedral voids, so the coordination number is 6 for each ion (option 1).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

Was this answer helpful?

The ionic radii of A^+ and B^- ions are 0.98×10^-10 m and 1.81×10^-10 m. The coordination number of each ion in AB is :

1 answer

Your answer