Copper is used to make electrical wire because it is a good conductor.

Question

Physical or chemical
Cesium produces an explosion when it is added to water.
Physical or chemical
Hydrogen is the least dense of all elements.
Physical or chemical

Answer 1

1. Copper is used to make electrical wire because it is a good conductor. - Physical (This statement describes a physical property of copper.)

2. Cesium produces an explosion when it is added to water. - Chemical (This describes a chemical reaction between cesium and water.)

3. Hydrogen is the least dense of all elements. - Physical (This statement describes a physical property of hydrogen.)