Chemical Formula Review

Front

What is a chemical formula?

Back

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

Front

What does a subscript in a chemical formula indicate?

Back

A subscript indicates the number of atoms of the element in a molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.

Front

What is the difference between elements and compounds?

Back

Elements are pure substances that consist of only one type of atom, while compounds are substances formed when two or more different elements chemically bond together.

Front

How many total atoms are in the compound NaClO?

Back

There are 3 total atoms in NaClO (1 Sodium, 1 Chlorine, 1 Oxygen).

Front

True or False: The total number of elements and atoms are the same in a chemical formula.

Back

False. The total number of elements refers to the different types of atoms, while the total number of atoms refers to the sum of all atoms present.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

Which compound contains four atoms of oxygen: CH4, NaOH, H2SO4, or C8H10N4O2?

Back

H2SO4 contains four atoms of oxygen.

Front

True or False: Subscripts are written above and to the right of a chemical symbol.

Back

False. Subscripts are written below and to the right of a chemical symbol.

Front

What elements make up the formula 2NO2?

Back

2NO2 consists of 2 Nitrogen atoms and 4 Oxygen atoms.

Front

What does the formula C6H12O6 represent?

Back

C6H12O6 represents glucose, a simple sugar.