Today's Rocket Words: Your 5 words and meanings to learn

compound

A substance formed when two or more chemical elements are chemically bonded together.

element

When something only contains one type of atom. This can be a single atom or a molecule.

mixture

When there is more than one atom of molecule together, but they are not chemically bonded to each other.

helium

A chemical element. It is the second smallest atom in the world.

methane

A compound made from one atom of carbon and four atoms of hydrogen.

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