Why is CuCl more covalent than NaCl?

Why is PCl_(5) more covalent than PCl_(3) ?

Statement I: CuCl Is more covalent than NaCl. Statement II: CuCl Is more covalent than NaCl, Cu^(+) is Small and have 3s^(2)" "3p^(6)" "3d^(10) configuration and show greater polarisation.

Why is PCI_5 , more covalent than PCI_3 ?

CuCl is more covalent than NaCl. Give reason.

Answer the following: why are PCL_5 more covalent than PCl_3 ?