Counting Elements and Atoms

Front

How do you count atoms in a chemical formula?

Back

You count atoms by using both subscripts and coefficients.

Front

How many Sodium (Na) atoms are in 6NaCl?

Back

6

Front

What represents a molecule and uses symbols to show the number of atoms in each element?

Back

Chemical Formula.

Front

What does a subscript indicate in a chemical formula?

Back

A subscript is a small number below an element symbol that tells the number of atoms of that element.

Front

What is the second letter of an element's symbol always?

Back

The second letter is always a lowercase letter.

Front

What is a coefficient in a chemical formula?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or atoms are present.

Front

What is the purpose of a chemical formula?

Back

A chemical formula shows the types and numbers of atoms in a molecule.

Front

What does the term 'subscript' refer to in chemistry?

Back

A subscript is a number written below and to the right of a chemical symbol indicating the number of atoms of that element.

Front

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

Back

Add the number of atoms represented by the subscripts for each element in the compound.

Front

What is the difference between a molecule and a compound?

Back

A molecule is two or more atoms bonded together, while a compound is a molecule that contains at least two different elements.