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QR Challenge: Finals Review

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. The change in matter in which chemical bonds are broken, rearranged, and reformed is called a _____. A) chemical formula B) chemical reaction C) chemical equation D) chemical compoundB
2. 2. When a substance changes phase, the chemical structure of its molecules does not change. A) false B) trueB
3. 3. Which example best describes a chemical change in matter? A) a newspaper being torn into pieces B) a car rusting C) an ice cream cone melting D) a cup of water freezingB
4. 4. Reactivity is a chemical property of matter. A) true B) falseA
5. 5. Why are standardized units of measurement important? A) It's impossible to make any measurements without a standardized system. B) Having a common reference is important for communicating data. C) People do not make measurement errors if they use standardized units. D) Kings and queens insisted that measurements be based on their unique sizesB
6. 6. The metric system is a system of measurement used in science and throughout the world to measure matter. A) false B) trueB
7. 7. Which word describes the unit of measurement for the energy that food contains?A) calorie B) gram C) pound D) milliliterA
8. 8. Reactivity is a chemical property of matter.A) false B) trueA
9. 9. A piece of paper is able to burn. Therefore, paper has the property of _____. A) density B) texture C) flammability D) displacementC
10. 10. What is a key property of the alkaline-earth metals? A) They are unreactive. B) They react readily. C) They have one valence electron. D) They gain electrons from other elements.B
11. 11. Which of the following is NOT a mixture? A) table salt B) lemonade C) garden soil D) salad dressingA
12. 12. Which of the following is a heterogeneous mixture? A) paint B) milk C) toothpaste D) graniteD
13. 13. You leave what appears to be a homogeneous mixture undisturbed on a counter. After several hours, you notice that solid particles have settled to the bottom of the container and the liquid is in a layer above them. This observation leads you to believe you have a _____.A) colloid B) alloy C) suspension D) solutionC
14. 14. The smallest piece of matter that cannot be broken down is called _____. A) a compound B) an atom C) a chemical formula D) a pure substanceB
15. 16. A way to describe the characteristics of matter using numbers and units is called _____.A) measurement B) observation C) enhancement D) classificationA
16. 17. Unique properties of elements are determined by atomic structure.A) true B) falseA
17. 19. Fluorine, a member of Group 17, has an atomic number of 9. How many valence electrons does it typically contain?A) 2 B) 7 C) 17 D) 9B
18. 22. A compound that conducts electricity when dissolved in water is always classified as an ionic compound.A) true B) falseA
19. 23. Calcium ions and chloride ions combine to form the stable ionic compound calcium chloride. If the calcium ion has an oxidation number of 2+, and the chloride ion has an oxidation number of 1–, which is the correct chemical formula for calcium chloride?A) CaCl B) CaCl2 C) Ca2Cl D) Ca2Cl2B
20. 24. In both ionic and molecular bonds, the resulting compound is stabilized because _____.A) each atom’s inner electronic orbital is empty B) each atom shares electrons with the other C) one atom transfers electrons to the other D) each atom’s outer electronic orbital is fullD
21. 25. Typically, an atom of an element in Period 4, Group 2 of the periodic table has electrons in how many energy levels?A) three B) four C) one D) twoB
22. 26. Mendeleev's periodic table was unique in that it:A) was organized by atomic massB) considered how alike groups of elements were C) had the number of protons in order from low to high D) was in order of increasing electronegativityA
23. 27. How many valence electrons are there in an ion that has a stable charge of -3?A) 7 B) 3 C) 5 D) 8C
24. 29. What did the grouping of elements in the periodic table into columns allow scientists to do?A) Look at trends in their reactivity.B) Predict new elements with similar properties.C) Make inferences about their comparative electronegativity.D) All of the aboveD
25. 31. Which of the following is NOT part of the electromagnetic spectrum?A) Infrared radiation B) Visible light C) Alpha particles D) PhotonsC
26. 32. What is the relationship between wavelength and frequency? A) As one increases, the other increases. B) As one decreases, the other decreases. C) As one increases, the other decreases. D) It depends on the speed of lightC
27. 33. Which of the following is true about elements in the same group? A) They are the same size. B) They often react with the same elements. C) They have increasing valence electrons. D) They are not related to each otherB
28. B) Group 2 - Alkaline Earth Metals C) Group 3 - Rare Earth Metals D) Group 8 - Noble GasesC
29. 35. How are the number of dots around the symbol in a Lewis Dot diagram determined? A) By its size. B) By its atomic number. C) By its mass. D) By its group numberD
30. 43. The Pauli Exclusion Principle states that a maximum of two electrons can be in a single atomic orbital. Since the s orbital can hold two electrons and the p orbital can hold six, how many orbitals would be used to hold a total of 5 electrons?A) 3 B) 4 C) 5 D) 6A
31. 47. Which of these is not a synonym?A) Shell B) Orbital C) Level D) ConfigurationD
32. A) Share all its electrons with the Hydrogen atoms. B) Share equally with the other atoms. C) Essentially have 8 valence electrons. D) Take the electrons away from Hydrogen to form an ionic bondB

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=1.-The-change-in-matter-in-which-chemical-bonds-are-broken,-rearranged,-and-reformed-is-called-a-_____.-A)-chemical-formula-B)-chemical-reaction-C)-chemical-equation-D)-chemical-compound

Question 1 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.-When-a-substance-changes-phase,-the-chemical-structure-of-its-molecules-does-not-change.--A)-false-B)-true

Question 2 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.-Which-example-best-describes-a-chemical-change-in-matter?-A)-a-newspaper-being-torn-into-pieces-B)-a-car-rusting-C)-an-ice-cream-cone-melting-D)-a-cup-of-water-freezing

Question 3 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=4.-Reactivity-is-a-chemical-property-of-matter.-A)-true-B)-false

Question 4 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=5.-Why-are-standardized-units-of-measurement-important?-A)-It's-impossible-to-make-any-measurements-without-a-standardized-system.-B)-Having-a-common-reference-is-important-for-communicating-data.-C)-People-do-not-make-measurement-errors-if-they-use-standardized-units.-D)-Kings-and-queens-insisted-that-measurements-be-based-on-their-unique-sizes

Question 5 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=6.-The-metric-system-is-a-system-of-measurement-used-in-science-and-throughout-the-world-to-measure-matter.--A)-false-B)-true

Question 6 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.-Which-word-describes-the-unit-of-measurement-for-the-energy-that-food-contains?A)-calorie-B)-gram-C)-pound-D)-milliliter

Question 7 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=8.-Reactivity-is-a-chemical-property-of-matter.A)-false-B)-true

Question 8 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=9.-A-piece-of-paper-is-able-to-burn.-Therefore,-paper-has-the-property-of-_____.-A)-density-B)-texture-C)-flammability-D)-displacement

Question 9 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=10.-What-is-a-key-property-of-the-alkaline-earth-metals?-A)-They-are-unreactive.-B)-They-react-readily.-C)-They-have-one-valence-electron.-D)-They-gain-electrons-from-other-elements.

Question 10 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=11.-Which-of-the-following-is-NOT-a-mixture?-A)-table-salt-B)-lemonade-C)-garden-soil-D)-salad-dressing

Question 11 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=12.-Which-of-the-following-is-a-heterogeneous-mixture?-A)-paint-B)-milk-C)-toothpaste-D)-granite

Question 12 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=13.-You-leave-what-appears-to-be-a-homogeneous-mixture-undisturbed-on-a-counter.-After-several-hours,-you-notice-that-solid-particles-have-settled-to-the-bottom-of-the-container-and-the-liquid-is-in-a-layer-above-them.-This-observation-leads-you-to-believe-you-have-a-_____.A)-colloid-B)-alloy-C)-suspension-D)-solution

Question 13 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=14.-The-smallest-piece-of-matter-that-cannot-be-broken-down-is-called-_____.-A)-a-compound-B)-an-atom-C)-a-chemical-formula-D)-a-pure-substance

Question 14 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=16.-A-way-to-describe-the-characteristics-of-matter-using-numbers-and-units-is-called-_____.A)-measurement-B)-observation-C)-enhancement-D)-classification

Question 15 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=17.-Unique-properties-of-elements-are-determined-by-atomic-structure.A)-true-B)-false

Question 16 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=19.-Fluorine,-a-member-of-Group-17,-has-an-atomic-number-of-9.-How-many-valence-electrons-does-it-typically-contain?A)-2-B)-7-C)-17-D)-9

Question 17 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=22.-A-compound-that-conducts-electricity-when-dissolved-in-water-is-always-classified-as-an-ionic-compound.A)-true-B)-false

Question 18 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=23.-Calcium-ions-and-chloride-ions-combine-to-form-the-stable-ionic-compound-calcium-chloride.-If-the-calcium-ion-has-an-oxidation-number-of-2+,-and-the-chloride-ion-has-an-oxidation-number-of-1–,-which-is-the-correct-chemical-formula-for-calcium-chloride?A)-CaCl-B)-CaCl2-C)-Ca2Cl-D)-Ca2Cl2

Question 19 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=24.-In-both-ionic-and-molecular-bonds,-the-resulting-compound-is-stabilized-because-_____.A)-each-atom’s-inner-electronic-orbital-is-empty-B)-each-atom-shares-electrons-with-the-other-C)-one-atom-transfers-electrons-to-the-other-D)-each-atom’s-outer-electronic-orbital-is-full

Question 20 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=25.-Typically,-an-atom-of-an-element-in-Period-4,-Group-2-of-the-periodic-table-has-electrons-in-how-many-energy-levels?A)-three-B)-four-C)-one-D)-two

Question 21 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=26.--Mendeleev's-periodic-table-was-unique-in-that-it:A)-was-organized-by-atomic-massB)-considered-how-alike-groups-of-elements-were-C)-had-the-number-of-protons-in-order-from-low-to-high-D)-was-in-order-of-increasing-electronegativity

Question 22 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=27.--How-many-valence-electrons-are-there-in-an-ion-that-has-a-stable-charge-of--3?A)-7-B)-3-C)-5-D)-8

Question 23 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=29.--What-did-the-grouping-of-elements-in-the-periodic-table-into-columns-allow-scientists-to-do?A)-Look-at-trends-in-their-reactivity.B)-Predict-new-elements-with-similar-properties.C)-Make-inferences-about-their-comparative-electronegativity.D)-All-of-the-above

Question 24 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=31.-Which-of-the-following-is-NOT-part-of-the-electromagnetic-spectrum?A)-Infrared-radiation-B)-Visible-light-C)-Alpha-particles-D)-Photons

Question 25 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=32.-What-is-the-relationship-between-wavelength-and-frequency?-A)-As-one-increases,-the-other-increases.-B)-As-one-decreases,-the-other-decreases.-C)-As-one-increases,-the-other-decreases.-D)-It-depends-on-the-speed-of-light

Question 26 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=33.-Which-of-the-following-is-true-about-elements-in-the-same-group?-A)-They-are-the-same-size.-B)-They-often-react-with-the-same-elements.-C)-They-have-increasing-valence-electrons.-D)-They-are-not-related-to-each-other

Question 27 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=B)-Group-2---Alkaline-Earth-Metals-C)-Group-3---Rare-Earth-Metals-D)-Group-8---Noble-Gases

Question 28 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=35.-How-are-the-number-of-dots-around-the-symbol-in-a-Lewis-Dot-diagram-determined?-A)-By-its-size.-B)-By-its-atomic-number.-C)-By-its-mass.-D)-By-its-group-number

Question 29 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=43.--The-Pauli-Exclusion-Principle-states-that-a-maximum-of-two-electrons-can-be-in-a-single-atomic-orbital.-Since-the-s-orbital-can-hold-two-electrons-and-the-p-orbital-can-hold-six,-how-many-orbitals-would-be-used-to-hold-a-total-of-5-electrons?A)-3-B)-4-C)-5-D)-6

Question 30 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=47.--Which-of-these-is-not-a-synonym?A)-Shell-B)-Orbital-C)-Level-D)-Configuration

Question 31 (of 32)

 


Finals Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=A)-Share-all-its-electrons-with-the-Hydrogen-atoms.-B)-Share-equally-with-the-other-atoms.-C)-Essentially-have-8-valence-electrons.-D)-Take-the-electrons-away-from-Hydrogen-to-form-an-ionic-bond

Question 32 (of 32)