Question

The atomic radius of $Ag$ is closest to:

• A. $Cu$
• B. $Hg$
• C. $Ni$
• D. $Au$

Answer 1

The correct option is D $Au$

Because of Lanthanide contraction, an increase in $Z_{\text{eff}}$ is observed and so, the size of $Au$ instead of being greater, as is expected, turns out to be similar to that of $Ag$.