AIEEE 2009 PYQ Mock Test

In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes.

In the highest oxidation states, the transition metal show basic character and form cationic complexes.

In the highest oxidation states of the first five transition elements ($\text{Sc}$ to $\text{Mn}$), all the $4s$ and $3d$ electrons are used for bonding.

Once the $d^5$ configuration is exceeded, the tendency to involve all the $3d$ electrons in bonding decreases.