Which of the following is not true for transition metals?

Identify the false statement about transition elements.

The ability of transition metal ions to form complex compounds is due to:

Which statement is true about the transition elements?

Electronic configuration of $Gd$ $(Z = 64)$ is

Fill in the blanks:
$(a)$ The ground state electronic configurations of $Cr$ and $Cu$ are .......... and ..........,respectively.
$(b)$ Transition elements exhibit certain characteristic properties due to partially filled $d$-orbitals.
$(c)$ The general electronic configuration of transition elements is .......... .