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QR Challenge: Periodic Trends

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. How many valence electrons does an atom of carbon have? 4
2. How many valence electrons does an atom of gallium have? 3
3. How many valence electrons does an ion of lithium have? 8
4. The generic formula for a structure that has a linear shape is ______ AX2
5. If a structure has a generic formula of AX2E, that shape is _________ Bent
6. Which shape has a lone pair, trigonal pyramidal or trigonal planar? Trigonal pyramidal
7. If a bonding pair of electrons is un-equally shared between two atoms, the bond is polar covalent
8. Find the difference of EN in the following molecule: CaCl2. What kind of bond is this? 2, ionic
9. Put the following bonds in order of increasing polarity: C – F C – I C – Br C-I , C-Br, C-F
10. Find the difference of EN in the following molecule: SO2. What kind of bond is this? 1, polar covalent
11. Find the difference of EN in the following molecule: NaCl. What kind of bond is this? 2.1, ionic
12. If I have a high EN, high ionization energy, and small atomic radius compared the rest of the atoms in my period, I am most likely going to be a (metal, nonmetal, metalloid) nonmetal
13. If I have a low EN, low ionization energy, and a large atomic radius compared to the rest of the atoms in my period, I am most likely going to be a (metal, nonmetal, metalloid) metal
14. True or False: Ca+2 has a smaller radius than Ca True
15. True or False: Be+2 has a larger radius than Ca+2 False
16. Which atomic radius is the largest: F, Cl, Br? Br
17. Which atomic radius is the smallest: Ga, Ge, As, Se? Se
18. Which atomic radius is the largest: Li, Na, K, Rb? Rb
19. Which family will gain one electron? Halogen (17)
20. Which family will lose two electrons? Alkali Earth Metals (2)
21. Which family has 8 valence electrons? Noble Gases (8)
22. How many lone pairs are in the entire molecule CO2? 4
23. How many bonds does the molecule O2 have? 2
24. How many bonds does the molecule CHCl3 have? 4
25. How many lone pairs does the molecule XeF4 have? 14
26. Which element has the greatest ionization energy: Lithium or Boron? B
27. Which element has the lowest ionization energy: Cesium or Aluminum Cesium
28. Which element has the larger electronegativity, carbon or oxygen? Oxygen
29. List the elements in order of decreasing radii Be+2, Ca+2, Mg+2 . Ca, Mg, Be
30. Which group of metals on the periodic table is the most reactive? Alkali
31. What shape does O3 have? Bent
32. What shaped does HCN have? Linear
33. Who is the central atom in CHCl3? Carbon
34. Which bond is more ionic, Ca-Cl or Li- F? Li-F
35. The vertical columns on the periodic table are called _______ Groups or Families
36. The horizontal rows on the periodic table are called ________ Periods
37. _____________ is the ability for an atom to attract an electron away from another atom EN
38. _____________ is the energy required for an atom to lose an electron IE
39. Around which atom will the electrons hang around more in the following molecule: HCl Cl
40. Around which atom will the electrons hang around more in the following molecule: CCl4 Cl
41. Across the periodic table, the atomic radius begins to ______________ decrease
42. Down the periodic table, the ionization energy begins to _______________ decrease
43. Across the periodic table, the electronegativity of an atom begins to _____________ increase
44. Do metals or non metals have a lower electronegativity? metals
45. Who is the best science teacher ever? Miss Dulio

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=How-many-valence-electrons-does-an-atom-of-carbon-have?

Question 1 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=How-many-valence-electrons-does-an-atom-of-gallium-have?

Question 2 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=How-many-valence-electrons-does-an-ion-of-lithium-have?

Question 3 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=The-generic-formula-for-a-structure-that-has-a-linear-shape-is-______

Question 4 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=If-a-structure-has-a-generic-formula-of-AX2E,-that-shape-is-_________

Question 5 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-shape-has-a-lone-pair,-trigonal-pyramidal-or-trigonal-planar?

Question 6 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=If-a-bonding-pair-of-electrons-is-un-equally-shared-between-two-atoms,-the-bond-is

Question 7 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Find-the-difference-of-EN-in-the-following-molecule:-CaCl2.-What-kind-of-bond-is-this?

Question 8 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Put-the-following-bonds-in-order-of-increasing-polarity:-C-–-F-------C-–-I-------C-–-Br

Question 9 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Find-the-difference-of-EN-in-the-following-molecule:-SO2.-What-kind-of-bond-is-this?

Question 10 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Find-the-difference-of-EN-in-the-following-molecule:-NaCl.-What-kind-of-bond-is-this?

Question 11 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=If-I-have-a-high-EN,-high-ionization-energy,-and-small-atomic-radius-compared-the-rest-of-the-atoms-in-my-period,-I-am-most-likely-going-to-be-a-(metal,-nonmetal,-metalloid)

Question 12 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=If-I-have-a-low-EN,-low-ionization-energy,-and-a-large-atomic-radius-compared-to-the-rest-of-the-atoms-in-my-period,-I-am-most-likely-going-to-be-a-(metal,-nonmetal,-metalloid)

Question 13 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=True-or-False:-Ca+2-has-a-smaller-radius-than-Ca

Question 14 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=True-or-False:-Be+2-has-a-larger-radius-than-Ca+2

Question 15 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-atomic-radius-is-the-largest:-F,-Cl,-Br?

Question 16 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-atomic-radius-is-the-smallest:-Ga,-Ge,-As,-Se?

Question 17 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-atomic-radius-is-the-largest:-Li,-Na,-K,-Rb?

Question 18 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-family-will-gain-one-electron?

Question 19 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-family-will-lose-two-electrons?

Question 20 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-family-has-8-valence-electrons?

Question 21 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=How-many-lone-pairs-are-in-the-entire-molecule-CO2?

Question 22 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=How-many-bonds-does-the-molecule-O2-have?

Question 23 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=How-many-bonds-does-the-molecule-CHCl3-have?

Question 24 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=How-many-lone-pairs-does-the-molecule-XeF4-have?

Question 25 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-element-has-the-greatest-ionization-energy:-Lithium-or-Boron?

Question 26 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-element-has-the-lowest-ionization-energy:-Cesium-or-Aluminum

Question 27 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-element-has-the-larger-electronegativity,-carbon-or-oxygen?

Question 28 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=List-the-elements-in-order-of-decreasing-radii-Be+2,-Ca+2,-Mg+2-.

Question 29 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-group-of-metals-on-the-periodic-table-is-the-most-reactive?

Question 30 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=What-shape-does-O3-have?

Question 31 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=What-shaped-does-HCN-have?

Question 32 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Who-is-the-central-atom-in-CHCl3?

Question 33 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Which-bond-is-more-ionic,-Ca-Cl-or-Li--F?

Question 34 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=The-vertical-columns-on-the-periodic-table-are-called-_______

Question 35 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=The-horizontal-rows-on-the-periodic-table-are-called-________

Question 36 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=_____________-is-the-ability-for-an-atom-to-attract-an-electron-away-from-another-atom

Question 37 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=_____________-is-the-energy-required-for-an-atom-to-lose-an-electron

Question 38 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Around-which-atom-will-the-electrons-hang-around-more-in-the-following-molecule:-HCl

Question 39 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Around-which-atom-will-the-electrons-hang-around-more-in-the-following-molecule:-CCl4

Question 40 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Across-the-periodic-table,-the-atomic-radius-begins-to-______________

Question 41 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Down-the-periodic-table,-the-ionization-energy-begins-to-_______________

Question 42 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Across-the-periodic-table,-the-electronegativity-of-an-atom-begins-to-_____________

Question 43 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Do-metals-or-non-metals-have-a-lower-electronegativity?

Question 44 (of 45)

 


Periodic Trends : QR Challenge

https://www.classtools.net/QR/decode.php?text=Who-is-the-best-science-teacher-ever?

Question 45 (of 45)