Chemical Formulas

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the quantity of each element.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript in a chemical formula indicates the number of atoms of the element present in one molecule of the compound.

Front

How many atoms of Aluminum are in Al₂O₃?

Back

2

Front

How many atoms of hydrogen are in a molecule of glucose (C₆H₁₂O₆)?

Back

12

Front

What do we call a substance made up of two or more different elements?

Back

A compound.

Front

What is the chemical formula for water?

Back

H₂O.

Front

How many Sodium (Na) are in 6NaCl?

Back

6

Front

What is the chemical formula for carbon dioxide?

Back

CO₂.

Front

What does the prefix 'mono-' mean in chemistry?

Back

It indicates one atom of an element in a compound.

Front

What is the chemical formula for methane?

Back

CH₄.