Oxygen and Ozone
Where is oxygen of the Periodic table? ___________________________________
How many electrons does oxygen have in its outer shell? ____________________
What is the chemical formula for molecular oxygen? _______________________
What is the state of molecular oxygen? __________________________________
What type of bonding exists in molecular oxygen? _________________________
Molecular oxygen contains a double bond. Draw a diagram to show the arrangement of
electrons in molecular oxygen. Make a model and take a photo.
What shape is molecular oxygen? ______________________________________
Look up the energy require to break the bond between the atoms on molecular oxygen.
____________________________________
The chemical formula for ozone is O3. It contains a double and single bond. Draw a diagram
to show the arrangement of electrons in molecular ozone. Make a model and take a photo.
What shape is molecular ozone? ______________________________________
Look up the energy require to break each of the bonds between the atoms on molecular
ozone.
____________________________________
Calculate the wavelength electromagnetic radiation that corresponds to each of the bond
energies and compete the table below.*
Molecule Single
bond
oxygen
ozone
Bond
energy (kJ)
 (m)
Double
bond
Bond
energy (kJ)
*Energy (J) = h; h (Planck's constant) = 6.63 x 10-34 (Js);  = frequency (s-1)
c = ; c = 3.0 x 108 ms-1;  = wavelength (m);  = frequency (s-1)
 (m)
UV Light.
There are several types of UV light.
Research and summarise them in the table below.
Type of UV light
UV-A
UV-B
UV-C
 (m)
Effect on the biosphere
Explain the importance of ozone in the stratosphere.
1.
2.
3. LINK: therefore, so, because ........
Methods of protection