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QR Challenge: Finals Review B

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. 21. Following the IUPAC rules for naming compounds, MgCl2 is named _____.A) chloro-magnesium B) dichloro-magnesium C) magnesium chlorine D) magnesium chlorideD
2. 22. A compound that conducts electricity when dissolved in water is always classified as an ionic compound.A) true B) falseA
3. 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
4. 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
5. 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
6. 26. Mendeleev's periodic table was unique in that it:A) was organized by atomic massB) considered how alike groups of elements wereC) had the number of protons in order from low to highD) was in order of increasing electronegativityA
7. 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
8. 28. While elements with lower atomic numbers often have the same number of protons and neutrons, this changes as the atomic numbers grow larger. How does it change and why?A) The number of neutrons becomes higher than the number of protons because it becomes too heavy to have the same number.B) The number of protons becomes higher than the number of neutrons because you need more positive charges to balance the negative charges.C) The number of neutrons becomes higher because the protons are unstable if they're too close together due to their charge.D) The number of protons becomes higher than the number of neutrons because the protons have to be at a greater distance from the electrons to be stableC
9. 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
10. 30. In which direction does the size of atoms increase?A) To the left and up.B) To the right and up.C) To the left and down.D) To the right and downC

 


Finals Review B: QR Challenge

https://www.classtools.net/QR/decode.php?text=21._Following_the_IUPAC_rules_for_naming_compounds,_MgCl2_is_named______.A)_chloro-magnesium_B)_dichloro-magnesium_C)_magnesium_chlorine_D)_magnesium_chloride

Question 1 (of 10)

 


Finals Review B: 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 2 (of 10)

 


Finals Review B: 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 3 (of 10)

 


Finals Review B: 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 4 (of 10)

 


Finals Review B: 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 5 (of 10)

 


Finals Review B: 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_wereC)_had_the_number_of_protons_in_order_from_low_to_highD)_was_in_order_of_increasing_electronegativity

Question 6 (of 10)

 


Finals Review B: 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 7 (of 10)

 


Finals Review B: QR Challenge

https://www.classtools.net/QR/decode.php?text=28.__While_elements_with_lower_atomic_numbers_often_have_the_same_number_of_protons_and_neutrons,_this_changes_as_the_atomic_numbers_grow_larger._How_does_it_change_and_why?A)_The_number_of_neutrons_becomes_higher_than_the_number_of_protons_because_it_becomes_too_heavy_to_have_the_same_number.B)_The_number_of_protons_becomes_higher_than_the_number_of_neutrons_because_you_need_more_positive_charges_to_balance_the_negative_charges.C)_The_number_of_neutrons_becomes_higher_because_the_protons_are_unstable_if_they're_too_close_together_due_to_their_charge.D)_The_number_of_protons_becomes_higher_than_the_number_of_neutrons_because_the_protons_have_to_be_at_a_greater_distance_from_the_electrons_to_be_stable

Question 8 (of 10)

 


Finals Review B: 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 9 (of 10)

 


Finals Review B: QR Challenge

https://www.classtools.net/QR/decode.php?text=30.__In_which_direction_does_the_size_of_atoms_increase?A)_To_the_left_and_up.B)_To_the_right_and_up.C)_To_the_left_and_down.D)_To_the_right_and_down

Question 10 (of 10)