Question

3. The metal which reacts violently with cold water is -
a. Magnesium
c. Sodium
b. Zinc
d Copper​

Answer 1

magnesium

please mark Me Brainliest

Answer 2

sodium

sodium is a very reactive metal because it's ionisation energy(energy required to knock the Valence electron by the electrostatic force) is very less. so it can loss it's electron very easily to react with other elements in cold water or in low energy.

vote it if you found it helful