Counting Atoms

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What is a molecule?

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A molecule is a group of two or more atoms bonded together. It can consist of the same or different types of atoms.

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What is a compound?

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A compound is a substance formed when two or more different types of atoms bond together chemically.

Front

What is the chemical formula for water?

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Back

A molecule of water contains 3 atoms: 2 hydrogen atoms and 1 oxygen atom.

Front

What does the subscript in a chemical formula indicate?

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Front

What is the chemical formula for magnesium sulfate?

Back

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Front

What is the chemical formula for a compound with 1 nickel atom and 2 fluorine atoms?

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Front

What are molecules made of more than one type of atom called?

Back

Molecules made of more than one type of atom are called compounds.