Final answer:
The claim is false because new substances formed by a chemical change have different chemical and physical properties, evidenced by changed properties in substances like rusting iron.
Step-by-step explanation:
The statement that the new substances produced by a chemical change have the same chemical and physical properties as before is false. When a chemical change occurs, the original substances' atoms are rearranged into new molecules, forming substances with different chemical properties. Moreover, these new substances also tend to have different physical properties compared to the original substances. As an example, when iron rusts, it undergoes a chemical change to form iron oxide, which has very different properties than metallic iron.