Counting Atoms

Front

What is a coefficient in a chemical formula?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or atoms of that substance are present.

Front

How many total atoms are in the formula 4H2O?

Back

There are 12 total atoms in 4H2O (8 Hydrogen atoms and 4 Oxygen atoms).

Front

What does a subscript indicate in a chemical formula?

Back

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

Front

What is the chemical symbol for Oxygen?

Back

The chemical symbol for Oxygen is O.

Front

How many Hydrogen atoms are in one molecule of H2O?

Back

There are 2 Hydrogen atoms in one molecule of H2O.

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms of an element in a molecule.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

How many Oxygen atoms are in the formula 4H2O?

Back

There are 4 Oxygen atoms in the formula 4H2O.

Front

What does the '2' in H2 represent?

Back

The '2' in H2 represents that there are 2 Hydrogen atoms.

Front

What is an element in chemistry?

Back

An element is a pure substance that cannot be broken down into simpler substances and is represented by a chemical symbol.