1. Topic
Covalent bonding : the covalent challenge!
Level
GCSE (or any course for students aged 14-16)
Outcomes
Students are able to draw dot and cross diagrams for simple covalent molecules, including double and triple bonds
This resource was contributed By Deborah Brown
Instructions for teachers: this resource is fantastic, as it allows students to progress at their own rate as they draw dot and cross diagrams for covalent molecules. Start by printing off the slides 5-34 two-sided onto paper. You will need at least two sets depending on your class size. Lay these out around the classroom.
Start by getting students to draw H2 in their books. When they get this correct they can start the challenge and move around the room to draw dot and cross diagrams of each molecule. They can check to see if they are right by turning over the card to see the correct answer. If they are incorrect, they must correct their drawing. Students then move onto the next molecule until all have been completed.
| resources for science teachers who like to think

2. F2 H2 HF
HCl
CH4
SiF4
H2O
NH3 O2

3. CO2
SCl2 N2
CS2
C2H4
HCN
H2CO
Show teacher

4. H2
Draw a dot and cross diagram for hydrogen. When you are correct, you can start the covalent challenge!

5. F2 F F

6. F F
Go to HF

7. HF H F

8. Go to HCl

9. HCl

10. Go to CH4

11. CH4

12. Go to SiF4

13. SiF4

14. F F Si F F
Go to H2O

15. H2O

16. Go to NH3

17. NH3

18. Go to O2

19. O2

20. Go to CO2

21. CO2

22. Go to SCl2

23. SCl2

24. S Cl Cl
Go to N2

25. N2

26. Go to CS2

27. CS2

28. S S
Go to C2H4

29. C2H4

30. Go to HC=N -

31. HCN

32. Go to H2C=O

33. H2CO

34. You are an expert!!
Show your teacher.