The compound with the highest degree of covalency is : — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: According to Fajan's rules, transition metal cations with a pseudo-noble gas configuration ((n-1)d10 ns0) have much higher polarizing power than s-block cations of similar size and charge because d-electrons shield the nuclear charge very poorly. Step 2: The Ag^+ ion has a pseudo-noble gas configuration ([Kr] 4d10), giving it significantly greater polarizing power than Na^+, Mg^2+, or Cs^+. Step 3: This high polarizing power results in AgCl having the highest degree of covalency among the given options, matching option (c).