Simple covalent substances - Eduqas

1

How many electrons are shared in a single covalent bond?

2

Carbon atoms and hydrogen atoms combine to make CH4, which is a covalent…….. What is the missing word?

3

What is represented by the diagram O = O ?

4

Phosphorus is in group 5 of the periodic table. How many covalent bonds will phosphorus form in compounds?

5

Chlorine and hydrogen react together to form HCl. How many unbonded electrons will chlorine have in this compound?

6

Which molecule is represented by this dot and cross diagram?

Example of a complete dot and cross diagram

7

Which of these hydrocarbon molecules will have the highest boiling point?

8

When covalent molecules melt or boil, what is broken?

9

Sucrose is a covalent compound. Under what circumstances does sucrose conduct electricity?

10

Sodium chloride is often shown as a dot and cross diagram. What limitation is there in this representation?