Question

Name the following: A transition metal that undergoes maximum corrosion.

Answer 1

Transition elements: Transition elements are those that have partially filled d-orbitals. The elements belonging to Group 3-12 are all considered transition elements.

For Example- Scandium (Sc), Nickel (Ni), Copper (Cu), Iron (Fe), Rhodium (Rh), Palladium (Pd).

Reason for Iron being most corrosive:

The transition element that corrodes easily is Iron (Fe). When Iron comes in contact with air (oxygen) and moisture, a layer of iron (III) oxide ${\mathrm{Fe}}_2{\mathrm{O}}_3$ is formed. As this layer is too porous, it does not even protect the iron from further rusting.

Iron is the metal that forms two types of ions that are ${{\mathrm{Fe}}^{2+}}^{}$and ${{\mathrm{Fe}}^{3+}}^{}$Therefore, Iron undergoes maximum corrosion.

Hence, a transition metal that undergoes maximum corrosion is Iron (Fe).