QR Challenge: Atomic Structure 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. neutron, proton, electron	1
2. number of protons	2
3. electrons in the outermost energy level/shell	3
4. 7	4
5. False: in a neutral atom, the number of electrons equal the number of protons, which can be determined by the atomic number	5
6. D	6
7. 8	7
8. C	8
9. False: in a neutral atom, the number of electrons equal the number of protons. If an atom loses electrons then the atom has more protons (+) and the resulting overall charge will be positive (+)	9
10. Atom A & Atom C (both have 8 protons)	10
11. B	11
12. C	12
13. B	13
14. B	14
15. 15	15
16. Isotopes are atoms of the same element with the same number of protons but different number of neutrons	16
17. B	17
18. 48	18
19. 20	19
20. Neon	20
21. 4 protons, 5 neutrons, 4 electrons	21
22. True: in a neutral atom, the number of electrons equal the number of protons. If an atom gains electrons then the resulting overall charge will be negative (-).	22
23. Atom A & Atom B (both have 6 protons)	23
24. The overall charge would be 3-	24
25. Sodium is a metal, has 11 protons/electrons, has 12 neutrons, has 1 valence electron. Bromine is a non-metal, has 35 protons/electrons, has 45 neutrons, has 7 valence electrons.	25
26. Magnesium lost two electrons	26
27. Picture	27

 

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