QR Challenge: Ionic and Covalent Bonding

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

• Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
• Bring these devices into the lesson.

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

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B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

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C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

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Questions / Answers (teacher reference)

Question	Answer
1. What is the definition for an ionic bond?
2. What is the definition of a covalent bond?
3. Sodium Chloride is an ionic compound. Draw the dot and cross diagram to show an ionic bond.
4. Water (H2O) is a covalent compound. Draw the dot and cross diagram to show the covalent bonds in water.
5. Magnesium Chloride (MgCl2) is also an ionic compound. Draw the dot and cross diagrams to show the ionic bonds in this compound.
6. Carbon Dioxide (CO2) is another covalent compound, Draw the dot and cross diagram show the covalent bonds formed in this compound.
7. What type of structure do ionic compounds form? Draw an example
8. Some elements form giant covalent compounds. Give an example and explain why it forms this structure.
9. Ionic compounds have high melting and boiling points. Explain why?
10. Simple covalent compounds have low boiling and melting points. Explain why?
11. Diamond has a high boiling and melting point. Explain why?
12. Ionic substances will conduct electricity when dissolved or molten. Explain why?
13. Diamond is the hardest known material on Earth. Explain why?
14. Most Covalent compounds do not conduct electricity. Explain why?

 

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