Explanation:
Amphoteric oxides reacts with both acids and alkalis to form salts and water. Examples of amphoteric oxides are zinc oxide aluminium oxide and tin oxide. Generally in group $14 \mathrm{SiO}_2$ and $\mathrm{CO}_2$ are acidic where as in second group due to alkali nature of elements it oxide are basic.
Amphoteric $\rightarrow$ Acidic/Basic
Metals $\rightarrow$ Basic, Amphoteric
Amphoteric Metals $\rightarrow \mathrm{Be}, \mathrm{Sc}, \mathrm{Ti}, \mathrm{V}, \mathrm{Cr}, \mathrm{Fe}, \mathrm{Co}, \mathrm{Cu}, \mathrm{Zn}$, $\mathrm{Al}, \mathrm{Ge}, \mathrm{Sn}, \mathrm{Zn}, \mathrm{Ag}, \mathrm{Ga}, \mathrm{Au}, \mathrm{In}, \mathrm{T1}, \mathrm{Pb}, \mathrm{Sb}, \mathrm{Bi}$