Transition element makes complex compound due to
presence of $d-$ orbital
large size
variable valency
presence of $2e^-$
Highest $(+7) $ oxidation state is shown by
Which of the following set of elements does not belong to transitional elements set
Passing $H_2S$ gas into a mixture of $Mn^{+2}, Ni^{+2}, Cu^{+2}$ and $Hg^{2+}$ ions in an acidified aqueous solution precipitates
Why first ionisation enthalpy of $\mathrm{Cr}$ is lower than that of $\mathrm{Zn}$ ?
The colorless species is