The pair that has similar atomic radii is

Discuss the magnetic properties of transition elements.

Which element from the following is the last element of the $5d$-transition series?

The $E^{\circ}$ value for the $Mn^{3+} / Mn^{2+}$ couple is more positive than that of $Cr^{3+} / Cr^{2+}$ or $Fe^{3+} / Fe^{2+}$ due to change of

Choose the correct statement. $Fe^{3+}$ ion is more stable than $Fe^{2+}$ ion because

Which of the following is expected to form a colourless complex?