Transition element makes complex compound due to
Presence of empty $d-$ orbital
large size
Variable valency
presence of $2e^-$
Technetium, the element below manganese in the Periodic Table, would be expected to have high values for its
$(I)$ melting point $(II)$ boiling point $(III)$ density
What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.
Out of $\mathrm{Cu}_{2} \mathrm{Cl}_{2}$ and $\mathrm{CuCl}_{2}$, which is more stable and why ?
In a transition series, as the atomic number increases, paramagnetism
$Cu^+$ ion is not stable in aqueous solution, due to