Ozone in the earth's stratosphere is created by ultraviolet light striking oxygen molecules containing two oxygen atoms (O 2), splitting them into individual oxygen atoms (atomic oxygen); the atomic oxygen then combines with unbroken O 2 to create ozone, O 3.
Ozone in the earth's stratosphere is created by ultraviolet light striking oxygen molecules. These ultraviolet light striking oxygen molecules are containing two oxygen atoms (O 2), splitting them into individual oxygen atoms (atomic oxygen). The atomic oxygen then combines with unbroken O 2. This is to create ozone. Ozone is O 3.