Which of the following is paramagnetic
$N{i^{ + 2 }}$
$C{u^ + }$
$Z{n^{ + 2 }}$
$S{c^{ + 3 }}$
Which one of the following does not correctly represent the order of property indicated against it
The correct order of the first ionization enthalpies is
The compound which does not show paramagnetism is :-
Assertion : Magnetic moment of $Dy$ is highest among lanthanoids.
Reason : Orbital motion contributes magnetic moment.
The melting point of $Zn$ is lower as compared to those of the other elements of $3d$ series because