Question

is this an image of a chemical change? A chemist adding liquid that bursts into flames and person holding a piece of gallium metal which can start melting it body temperature

Answer 1

Yes, both scenarios involve chemical changes. The chemist adding liquid that bursts into flames likely indicates a highly exothermic reaction, which is a chemical change. On the other hand, holding a piece of gallium metal can cause it to start melting due to the reaction between gallium and the heat from the person's body, which is also a chemical change.