The components of German silver alloy are:

In which of the following pairs,the outermost electronic configuration will be the same?

The metal ion (in gaseous state) with the lowest spin-only magnetic moment value is .... .

The decrease in atomic volume from $Cr$ to $Cu$ in the $3d$ series is very negligible because:

$d$-block elements form

Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following points:
$(i)$ electronic configurations,
$(ii)$ oxidation states,
$(iii)$ ionisation enthalpies,and
$(iv)$ atomic sizes.