Answer:
the volume will expand
Explanation:
gas under pressure contracts, and expands with a lesser pressure
You just need the number of protons and number of neutrons as the mass of eelctrons is negligible
The best answer is the first option. A bike rusting is an example of a chemical change since rusting is a chemical reaction. New substances are formed from this reaction. On the other hand, other choices given are just physical changes because only the shape or the physical form of the substances are being changed.
