Counting Atoms Short

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What does the chemical formula C2H8O represent?

Back

C2H8O represents a compound, specifically ethanol.

Front

How do you determine the number of atoms in a chemical formula?

Back

Count the subscripts in the formula; if there is no subscript, it is assumed to be 1.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

How many hydrogen atoms are in H2O?

Back

There are 2 hydrogen atoms in H2O.

Front

What is the chemical formula for hydrogen peroxide?

Back

The chemical formula for hydrogen peroxide is H2O2.

Front

How many nitrogen atoms are in (NH4)2CrO4?

Back

There are 2 nitrogen atoms in (NH4)2CrO4.

Front

How many oxygen atoms are in H2O?

Back

There is 1 oxygen atom in H2O.

Front

How many carbon atoms are in C6H12O6?

Back

There are 6 carbon atoms in C6H12O6.

Front

What is the significance of subscripts in a chemical formula?

Back

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