Answer:
When a metal is heated, the free electrons gain
c. kinetic energy
Explanation:
Kinetic energy is an energy possessed by an object due to its movement.
Metals contain free electrons which are called delocalised electrons, they move freely, when a metal is heated they vibrate and move more quickly - this electrons gain kinetic energy from the excess vibrating ions. They move around thereby transferring some of their energy to the nearby particles
