Number of ions with pseudo inert gas configuration `Cu^(+),Na^(+),Ag^(+),Au^(+),K^(+)`

Number of unpaired electrons in inert gas is

Which of the following ions has a pseudo-inert-gas configuration?

The following has pseudo-inert gas configuration in the (n-1) shell.

What is the electronic configuration of Cu^(+) ion

Assertion Among two cations of similar size the polarising power of cation with pseudo noble gas configuration is larger than cation with noble gas configuration Reasoning Polarising power of Ag^(o+) is more than K^(o+) .

Assertion:- ZN^(+2) is more polarising than Mg^(+2) . Reason :- A pseudo inert gas configuration Zn^(+2) has high Z_(eff) , Then inert gas configuration of Mg^(+2)