QR Challenge: Periodic Table Answers

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. halogens	1
2. A and B	2
3. D	3
4. atomic number	4
5. noble gases	5
6. mass number-atomic number	6
7. C	7
8. B	8
9. both members of the alkali metal family	9
10. B	10
11. Aluminum is not an alkali metal	11
12. alkaline earth metals	12
13. Ca-alkaline earth metal, Fe-transition metal, Br-halogen	13
14. A	14
15. B	15
16. B	16
17. B	17
18. alkali metal	18
19. B	19
20. C	20
21. B	21
22. 13 protons, 14 neutrons, 13 electrons	22
23. flourine	23
24. D	24
25. B	25
26. 24 protons, 28 neutrons, 24 electrons	26
27. C	27
28. oxygen	28
29. Mg with two valence electrons	29
30. the outer valence shell is incomplete, additionally this is the Bohr diagram for silicon	30
31. transition metals	31
32. C	32
33. magnesium has two valence electrons, not three	33
34. Br with 7 valence electrons	34
35. B	35
36. sulfur	36
37. nonmetal, this is the Bohr diagram for oxygen	37
38. Si with 4 valence electrons	38
39. B	39
40. C	40
41. 1s2 2s2 2p6 3s1 or [Ne]3s1	41
42. rubidium has one valence electron, not two	42
43. B	43
44. A	44
45. 1s2 2s2 2p6 3s2 3p4 or [Ne]3s2 3p4	45

 

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