Which of the following is least ionic?

Question

Canvas Classes · Accepted Answer

Ionic character depends on the polarising power of the cation (charge/radius ratio) and polarisability of the anion. Higher polarisation → more covalent character → less ionic.

Step 1 — Apply Fajans' Rules:
A compound is less ionic (more covalent) when:
- Cation has high charge and small size (high charge density)
- Cation has a pseudo-noble gas configuration (18-electron config)

Step 2 — Analyse each compound:
- : Ba²⁺ is large, noble gas config → high ionic character
- AgCl: Ag⁺ has 18-elect

More questions from Chemical Bonding