which of the following happens during a chemical change but does not happen during a physical change

the state of the substance changes
atoms of one or more substances rearrange into a new substance
the mass of the substance changes
the appearance of the substance changes but it is still the same substance

1 answer

During a chemical change, the following occurs which does not happen during a physical change:

Atoms of one or more substances rearrange into a new substance.

In a chemical change, substances transform into new substances with different properties, whereas in a physical change, the substance may change its state or appearance but remains the same substance at the molecular level.

The other options you listed may occur in physical changes, but the key distinction is the rearrangement of atoms that signifies a chemical change.