Chemical Reactions

Front

What is a Chemical Formula?

Back

A way of writing what elements are in a compound and how many atoms of each element there are. For example, the chemical formula for water is H₂O.

Front

What is a Substance?

Back

A type of matter with a specific set of properties. Examples include water, salt, and sugar.

Front

What is a Compound?

Back

A substance made when two or more different elements are chemically combined. For example, water is a compound made of hydrogen and oxygen.

Front

What is Matter?

Back

Anything that has mass (weight) and takes up space. Everything around you, like air, water, and rocks, is made of matter.

Front

What is a Proton?

Back

A tiny particle in the nucleus (center) of an atom that has a positive charge.

Front

What is an Element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen, oxygen, and carbon.

Front

What is an Atom?

Back

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is a Neutron?

Back

A particle in the nucleus of an atom that has no charge (neutral).

Front

What is an Electron?

Back

A negatively charged particle that orbits the nucleus of an atom.

Front

What is a Mixture?

Back

A combination of two or more substances that are not chemically combined. Examples include air and salad.