Match the following metals with their reactivity based on reaction with water.

1. Less reactive
2. Moderately reactive
3. Highly reactive
4. Inert

Sodium reacts vigorously with cold water, so it is highly reactive.

Magnesium reacts with hot water but not with cold water. That means it requires some energy to react, so it is moderately reactive.

Aluminium does not react with hot water or cold water. It reacts only with steam which means it needs more energy. So, it is less reactive.

Gold does not react even with steam, it is considered as an inert metal.