● A covalent bond is formed by the electrostatic attraction between a shared pair of electrons and
the positively charged nuclei.
● Single, double, and triple covalent bonds involve one, two, and three shared pairs of electrons
respectively.
● Bond length decreases and bond strength increases as the number of shared electrons increases.
● Bond polarity results from the difference in electronegativities of the bonded atoms.
Guidance
Bond polarity can be shown either with partial charges, dipoles, or vectors.

● Deduction of the polar nature of a covalent bond from electronegativity values.
Guidance
Electronegativity values are given in section 8 of the data booklet.

Task:

• Pearson text book:
  

1. Look at the worked example P153
   
2. Complete the exercise 10-13 on page 154

• ​Oxford text book 
  

1. ​look at the worked example 1+2 page 103
   

​

Firing process of clay: 
The video is describing the baking of clay in a Kiln and outlining the reactions that take place during the  firing process.

Pottery glazes:
This video is describing the colours of glazes before and after the firing process. Chemical reaction equations are used to understand an y colour changes. 

Preparation for student knowledge/skills exchange:
DP Chemistry students:

1. Watch both of the video about the firing process of clay and pottery glazes - take notes 
2. Use the diagram " Reaction that take place during the firing process", as well as the extra resources to work out the chemical equations for each of the  reactions in the baking of clay 
3. Prepare a short lesson and visual tools to help you teach the following things to the DP Visual Art students:

• Reactions that take place during the firing process 
• Reactions that explain colour changes of the glaze during the firing process 
• Comparing difference in the way that chemical involved are bonded  (ionic - for example CaCo3 / molecular covalent  - for example SO2 / Metals - for example cobalt)

DP Visual Art students:

1. Learn how to use the pottery equipment and produce at least one piece of glazed pottery 
2. Discuss as a class strategies that are important when teaching someone else pottery skills 
3. Identify Art pieces that are made out of  clay and prepare visuals and any other info about the art pieces to share with DP Chemistry students