Counting Atoms in Chemical Formulas

Front

What do the blue numbers in a chemical formula represent?

Back

Subscripts

Front

Where are subscripts located in a chemical formula?

Back

On the lower right-hand side of an element symbol.

Front

What is a compound?

Back

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

Front

Identify the compound in the following options: H₂O, Na, Cl.

Back

H₂O is a compound.

Front

How many atoms of Sodium (Na) are present in the formula 6NaCl?

Back

6 Sodium atoms.

Front

How many Magnesium (Mg) atoms are in the formula 10MgCl₂?

Back

10 Magnesium atoms.

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a compound.

Front

What is the difference between a coefficient and a subscript in a chemical formula?

Back

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

Front

How would you represent 3 molecules of water in a chemical formula?

Back

3H₂O.

Front

What does the formula CO₂ represent?

Back

Carbon dioxide, a compound made of one carbon atom and two oxygen atoms.