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QR Challenge: Periodic Table and Trends Scavenger Hunt

Created using the ClassTools QR Treasure Hunt Generator

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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

3. Print out the QR codes.

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

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!

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.

Questions / Answers (teacher reference)

Question

Answer

1. 1. When elements are arranged in order of increasing atomic number, there is a repeating pattern of their chemical and physical properties. Periodic Law
2. 2. What happens to the number of valence electrons as you go down a group?Number of valence electrons stays the same.
3. 3. What happens to the number of valence electrons as you go across a period?Number of valence electrons increases.
4. 4. The tendency of an atom to attract electrons to form an ionic bond. Electronegativity
5. 5. The size of an atomAtomic radius
6. 6. Energy required to remove an electron from a neutral atom. Ionization energy
7. 7. The trend in ionization energy and electronegativity as you go down a group and why this occurs. Decreases as you go down a group because electrons are close to the nucleus in smaller atoms making the attraction stronger.
8. 8. The trend in ionization energy and electronegativity as you go across a period and why this occurs. Increases to the right because electrons are held more tightly because of an increased charge.
9. 9. The trend in atomic radius as you go down a group and why this occurs. Increases as you go down a group because higher energy levels have larger orbitals so the size of atom increases.
10. 10. The most reactive nonmetal. Fluorine
11. 11. The trend in atomic radius as you go across a period and why this occurs. Increases to the left because electrons are held more loosely.
12. 12. The most reactive metal. Francium

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=1._When_elements_are_arranged_in_order_of_increasing_atomic_number,_there_is_a_repeating_pattern_of_their_chemical_and_physical_properties.

Question 1 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=2._What_happens_to_the_number_of_valence_electrons_as_you_go_down_a_group?

Question 2 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=3._What_happens_to_the_number_of_valence_electrons_as_you_go_across_a_period?

Question 3 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=4._The_tendency_of_an_atom_to_attract_electrons_to_form_an_ionic_bond.

Question 4 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=5._The_size_of_an_atom

Question 5 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=6._Energy_required_to_remove_an_electron_from_a_neutral_atom.

Question 6 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=7._The_trend_in_ionization_energy_and_electronegativity_as_you_go_down_a_group_and_why_this_occurs.

Question 7 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=8._The_trend_in_ionization_energy_and_electronegativity_as_you_go_across_a_period_and_why_this_occurs.

Question 8 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=9._The_trend_in_atomic_radius_as_you_go_down_a_group_and_why_this_occurs.

Question 9 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=10._The_most_reactive_nonmetal.

Question 10 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=11._The_trend_in_atomic_radius_as_you_go_across_a_period_and_why_this_occurs.

Question 11 (of 12)

 


Periodic Table and Trends Scavenger Hunt: QR Challenge

https://www.classtools.net/QR/decode.php?text=12._The_most_reactive_metal.

Question 12 (of 12)