Counting Atoms Practice!

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What does a subscript in a chemical formula indicate?

Back

A subscript indicates the number of atoms of the element in the molecule.

Front

What does a coefficient in a chemical equation represent?

Back

A coefficient indicates the number of molecules or moles of a substance.

Front

How many atoms are in one molecule of water (H₂O)?

Back

There are 3 atoms in one molecule of water: 2 Hydrogen and 1 Oxygen.

Front

How many total atoms are in the compound Al₂O₃?

Back

There are 5 total atoms in Al₂O₃: 2 Aluminum and 3 Oxygen.

Front

How many Hydrogen atoms are in 3(NH₄)₂CrO₄?

Back

There are 24 Hydrogen atoms in 3(NH₄)₂CrO₄.

Front

What is the chemical formula for Aluminum Oxide?

Back

The chemical formula for Aluminum Oxide is Al₂O₃.

Front

What is the total number of atoms in the compound C₆H₁₂O₆?

Back

There are 24 total atoms in C₆H₁₂O₆: 6 Carbon, 12 Hydrogen, and 6 Oxygen.

Front

How many Oxygen atoms are in the compound H₂SO₄?

Back

There are 4 Oxygen atoms in H₂SO₄.