The number of unpaired electrons in $Zn^{2+}$ is

The $E^{\Theta} (M^{2+} / M)$ value for copper is positive $(+0.34 \ V)$. What is the possible reason for this? (Hint: consider its high $\Delta_{a} H^{\Theta}$ and low $\Delta_{hyd} H^{\Theta}$)

The number of electrons in the outermost shell of the $3d-$ transition elements generally remains:

The electronic configuration of $Gd^{2+}$ is (at. no. of $Gd$ is $64$)

Discuss the magnetic properties of transition elements.

What should be the difference in atomic radii between two metal elements to form an alloy?