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QR Challenge: Review for SLO

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. Identify the number of significant figures in 0.000769 meters3
2. A chemistry student measures a length of 423mm, yet the lab she's working on requires that it be in kilometers. What is the length in kilometers?4.23x10-4km
3. Identify the term described: A three-dimensional structure that crystalline solids occupy.crystal lattice
4. If an atom has 71 protons, 71 electrons, and 104 neutrons, how many particles reside in the nucleus, and how many are out side of the nucleus?175-inside, 71-outside
5. Write the proper chemical symbol for an atom of bismuth with a mass of 209 amu.209 Bi 83
6. Draw the electron dot structure of potassium fluoride and show how the electron is transferred between the elements potassium and fluorine to create the ionic compound.K will give an electron.
7. Chlorine occurs in two common isotopes. It appears as 35-Cl 75.8% of the time and as 37-Cl 24.2% of the time. What is its average atomic mass?35.5amu
8. Name four physical properties of metals.solid, shiny, conductor of electricity and heat, give up electrons, malleable, ductile, forms salts
9. Why are the noble gases referred to as “noble”?The noble gases are described as “noble” because they seem to consider it beneath themselves to react with other elements. Because these elements have completely filled valence shells, they have no energetic reason to react. They’re already as stable as they can be.
10. Why are valence electrons important?The number of valence electrons in an atom largely determines the chemical reactivity of the atom and many other properties.
11. What is the energy of emitted light with a frequency of 6.88 x 1014 Hz?4.56 x 10-19J
12. Classify these as either metal, nonmetal, or metalloid. a-Selenium, b-Fluorine, c-Chromium.a-nonmetal, b-nonmetal, c-metal
13. Identify the term described: A chemical formula of a compound that indicates what atoms are present and the simplest whole-number ratio of the elements.empirical formula
14. Name the compound and state what type of compound: LiBrlithium bromide, ionic cmpd
15. The hydrogen lamp emits blue light at a wavelength of 487 nanometers (nm). What is the frequency in hertz?6.16x1014 s-1
16. Name the compound and state what type of compound: Mn2O3Manganese(III) oxide, ionic cmpd
17. Write the proper formulas for the following compound: Disulfur decafluoride.S2F10
18. If you have 7.9 x 1024 molecules of methane (CH4), how many moles of methane are present?13 mol CH4
19. Identify the term described: States that the electrons in an atom fill the lowest energy levels first.aufbau principle

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Identify_the_number_of_significant_figures_in_0.000769_meters

Question 1 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_chemistry_student_measures_a_length_of_423mm,_yet_the_lab_she's_working_on_requires_that_it_be_in_kilometers.__What_is_the_length_in_kilometers?

Question 2 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Identify_the_term_described:__A_three-dimensional_structure_that_crystalline_solids_occupy.

Question 3 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_an_atom_has_71_protons,_71_electrons,_and_104_neutrons,_how_many_particles_reside_in_the_nucleus,_and_how_many_are_out_side_of_the_nucleus?

Question 4 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Write_the_proper_chemical_symbol_for_an_atom_of_bismuth_with_a_mass_of_209_amu.

Question 5 (of 19)

 


Review for SLO: QR Challenge

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

Question 6 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Chlorine_occurs_in_two_common_isotopes.__It_appears_as_35-Cl_75.8%_of_the_time_and_as_37-Cl_24.2%_of_the_time.__What_is_its_average_atomic_mass?

Question 7 (of 19)

 


Review for SLO: QR Challenge

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

Question 8 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Why_are_the_noble_gases_referred_to_as_“noble”?

Question 9 (of 19)

 


Review for SLO: QR Challenge

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

Question 10 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_energy_of_emitted_light_with_a_frequency_of_6.88_x_1014_Hz?

Question 11 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Classify_these_as_either_metal,_nonmetal,_or_metalloid._a-Selenium,_b-Fluorine,_c-Chromium.

Question 12 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Identify_the_term_described:__A_chemical_formula_of_a_compound_that_indicates_what_atoms_are_present_and_the_simplest_whole-number_ratio_of_the_elements.

Question 13 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Name_the_compound_and_state_what_type_of_compound:_LiBr

Question 14 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_hydrogen_lamp_emits_blue_light_at_a_wavelength_of_487_nanometers_(nm).__What_is_the_frequency_in_hertz?

Question 15 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Name_the_compound_and_state_what_type_of_compound:_Mn2O3

Question 16 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Write_the_proper_formulas_for_the_following_compound:_Disulfur_decafluoride.

Question 17 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_you_have_7.9_x_1024_molecules_of_methane_(CH4),_how_many_moles_of_methane_are_present?

Question 18 (of 19)

 


Review for SLO: QR Challenge

https://www.classtools.net/QR/decode.php?text=Identify_the_term_described:__States_that_the_electrons_in_an_atom_fill_the_lowest_energy_levels_first.

Question 19 (of 19)