Counting Atoms

Front

What is the total number of different elements in the compound H₂COCH₂?

Back

3

Front

What is the total number of atoms in the compound CaCO₃?

Back

5

Front

What are the numbers found on the lower right-hand side of an element symbol called?

Back

Subscript

Front

How many atoms of Hydrogen are in H₂O?

Back

2

Front

What is a subscript in a chemical formula?

Back

A subscript indicates the number of atoms of an element in a molecule.

Front

What does a coefficient in a chemical equation represent?

Back

A coefficient indicates the number of molecules or moles of a substance.

Front

In the compound C₆H₁₂O₆, how many carbon atoms are present?

Back

6

Front

In the chemical formula NaCl, how many total atoms are there?

Back

2

Front

What is the significance of the chemical formula H₂SO₄?

Back

It indicates there are 2 hydrogen, 1 sulfur, and 4 oxygen atoms.

Front

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

Back

Add the subscripts of all elements in the chemical formula.