This is known as a chemical change. The other kind of change in chemistry is a physical change, which is when a substance changes without becoming a new chemical. These physical changes are often ...

chemical changes happen when chemical reactions occur. They involve the formation of new chemical elements or compounds. Physical properties close physical propertyA property of an element or ...

Sunscreen is typically categorised as either chemical or physical (or mineral), with much debate among ... It has been updated to include new products and reflect price changes.