What is meant by transition element?
Name the type of bonding that exists between a ligand and a transition element.
Which of the following species can act as a ligand? Complete the table by putting a tick ($\checkmark$) in the correct column to show whether each species can act as a ligand or not: $\text{NO}_3^-$, $\text{BF}_3$, $\text{H}_2\text{NCH}_2\text{CH}_2\text{NH}_2$, $\text{NH}_4^+$.
The manganese ions, $\text{Mn}^{2+}(aq)$, have some chemical properties similar to those of copper(II) ions, $\text{Cu}^{2+}(aq)$. Use this information together with the Data Booklet to suggest the formula of the manganese species formed in each of the following reactions. State the type of reaction in each case: $\text{Mn}^{2+}(aq) + \text{NaOH}(aq)$; $\text{Mn}^{2+}(aq) + \text{concentrated HCl}$; $\text{Mn}^{2+}(aq) + \text{H}_2\text{O}_2(aq)$.