Paramagnetism is not exhibited by

Determine whether the following statements are True $(T)$ or False $(F)$:
$(a)$ The atomic radii of the elements of the second transition series $(4d)$ are larger than those of the first transition series $(3d)$.
$(b)$ $Cr^{+}$,$Mn^{2+}$,and $Fe^{3+}$ have the same electronic configuration.
$(c)$ $Cr^{+}$,$Mn^{2+}$,and $Fe^{3+}$ have the same $d^5$ electronic configuration.

Which of the following elements has the maximum density?

An element in $+3$ oxidation state has the electronic configuration $[Ar]3d^3$. Its atomic number is

Which of the following compounds is colored?

Which of the following is coloured?