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 ...

Johnson at Yale University discusses how the two sides of physical ... of our enterprise changes as the tools we develop deliver increasingly clear microscopic pictures of chemical processes.

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 ...