Counting Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is a compound?

Back

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

Front

How do you count the total number of atoms in a compound?

Back

Add the subscripts of all the elements in the chemical formula.

Front

What does the subscript in a chemical formula represent?

Back

The subscript indicates the number of atoms of the element in the compound.

Front

In the compound C2H8O, how many carbon atoms are there?

Back

There are 2 carbon atoms.

Front

In the compound C2H8O, how many hydrogen atoms are there?

Back

There are 8 hydrogen atoms.

Front

In the compound C2H8O, how many oxygen atoms are there?

Back

There is 1 oxygen atom.

Front

How many total atoms are in the compound C2H8O?

Back

There are 11 total atoms (2 C + 8 H + 1 O).

Front

What is the formula for counting the number of elements in a compound?

Back

Count the different types of elements present in the chemical formula.

Front

In the compound Li2SO4, how many lithium (Li) atoms are there?

Back

There are 2 lithium atoms.