Question

which of the following is a physical property that can be changed without forming new molecules? flammability of a substance shape of a substance atomic structure of a substance

Explanation:

Physical properties are characteristics that can be observed or measured without changing the substance's chemical identity. Changing the shape of a substance is a physical change as no new molecules are formed. Flammability involves a chemical reaction and changing the atomic structure would also involve chemical changes.

Answer:

shape of a substance