Students recognize that a particular color change is a characteristic property of a substance and that a color change can also be used as evidence that a chemical reaction has occurred. Students will ...

Every chemical reaction involves a change in energy because different substances hold different amounts of energy. During the reaction, bonds inside the substances that are reacting together must ...

Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...

Show the Animation Different Substances have Different Reactions. Explain that different substances have unique or characteristic properties. One set of properties of a substance is the way it reacts ...

A new study from Cardiff and Bristol universities makes it possible to visualise chemical reactions involving small molecules, using software. Computer simulations ...