ngss chemistry questions; tentative; subject to change
include prompts in your CW / HW assignments, since it could be efficient when you are preparing / taking for a test .
fall semester [9 chapters]
*ch. 1. density (estimate ~ 1 week; 6 points)
1.1. what is density ?
1.2. describe a graphical method to estimate the density
1.3. what is a conversion factor ?
1.4. relate density & conversion factor
1.5 basis / rationale of your observations in the "wave toy" activity (i.e. relative position of the pegniun and two layers of liquid) using the concept of "bouyant force".
1.6 application(s) of using the concept(s) in this chapter
1.7 do lab activity
*ch. 2. atomic structure & periodic trends (estimate ~ 2 weeks; submit each assignment, separately)
2.1. AO assignment [7 points]
2.2. electron configuration / perioidic table assignment [7 points]
2.3. assigment: Coulomb's law & periodic trends in atomic size / ionization energy [27 points] + application of using the concept(s) in this chapter [1 point]
*ch. 3. spectroscopy (estimate ~ 2 weeks; 27 points)
3.1 background [6 points]
a. use the Bohr model of an atom to describe absorbance of light
b. use the Bohr model of an atom to describe the emission of light
c. basis / rationale for discrete absorption / emission spectrum
3.2 explore phet simulations; context = use to illustrate above concepts
a. hydrogen [6 points]
i. Prediction --> Bohr --> run simulation & describe observations of "solar system model"
ii. select "show electron energy level diagram"; run simulation / describe observations & relate to above
iii. select "show spectrometer"; run simulation / describe observations & relate to above
b. not hydrogen [4 points]
i. as above; while it lacks the "solar system" simulation, it can simulate other atoms than only hydrogen; describe observations and relate to above
3.3 Infared spectroscopy; background; e.g. video
a. spectra and questions [6 points]
3.4 how to identify the atoms in a star ? e.g. video
a. questions [4 points]
3.5 application(s) of using the concept(s) in this chapter
3.6 do lab activity
*ch. 4. radioactivity (estimate ~ 2 weeks; 19 points)
4.1 NGSS chemistry textbook; ch. 4 Radiation.
Explore: radioactive decay series. Part B: Trends and patterns in radioactive decay reactions.
Process & Procedure; # 2, 3, 5
fill-in the below blank (of a hypothetical (?) nuclear reaction)
a. 2H + 1H --> ____
b. 45Ca --> 4He + ____
c. 14C ---> beta particle + ____
d. 15N ---> positron + ____
e. 1n + 230Th ---> 2 1n + 90Sr + ___
Elaborate: Medical use of isotopes.
Process & Procedure: # 2, 3
Reflect & connect: # 1, 2, 3 (link )
Process & Procedure: # 2, 3, 4, 5
4.2 E = m c2 means ?
4.3 (optional) review the properties of the common (& natural) log functions and its corresponding inverse functions
4.4 A hypothetical radioactive isotope has a half-life of 120 years and a sample currently has 100 radioactive isotopes, while it originally had 300 radioactive isotopes; what is the "age" of the sample ?
4.5 application(s) of using the concept(s) in this chapter
4.6 do lab activity
*ch. 5. chemical bonds (estimate ~ 1 week; 15 points)
5.1 NGSS chemistry textbook; ch. 5 Bond
Explain: Electron tug of war. Part A: bonding models [2 points]
Process & Procedure: # 4, 6
Elaborate: ionic compounds. Part A: The reason for ionic compounds [7 points]
Process & Procedure: # 2
Part B: Practice making ionic compounds. Process & Procedure; # 2 - 7
5.2 take notes on screencasts about (i) ionic / covalent bonds and (ii) chemical name / chemical formula in honors chem tab
fill-in the below table [5 points]
chemical name chemical formula calcium fluoride copper (II) phosphate Li2S CO2 N2O5
5.3 application(s) of using the concept(s) in this chapter
*ch. 6 VSEPR and molecular polarity (~ 3 weeks; 7 points)
Henceforth, the prior scaffolds; e.g. your textbook and prior screencasts, will (usually) not be explicitly referred to in subsequent problems, so you have to become an indenpendent learner, where subsequent problems will "guide" you.
6.1 what is the name of the shape and the bond angle(s) of __
6.2 which of the preceding compounds are polar / nonpolar ? basis ?
6.3 application(s) of using the concept(s) in this chapter
6.4 do lab activity
*ch. 7. IMF (~ 2 weeks; 7 points)
7.1 do lab activity
7.2 identify the type(s) IMF in __; basis ?
7.3 what is the relative vapor pressure and boiling point of __; basis ?
a. CH4 versus CH3Cl
b. Br2 versus Cl2
c. CH3OH versus CH3Cl
7.4 application(s) of using the concept(s) in this chapter
*ch. 8. stochiometry & bond enthalpy and ch. 13. burning fuel; molar mass; stochiometry (~ 3 weeks; 9 points)
8.1 "balance" the chemical equation using the lowest ratio of integers
a. ___ C2H5OH + ___ O2 --> ___ CO2 + ____ H2O
b. ___ calcium nitrate + ___ sodium phosphate --> __ calcium phosphate + ___ sodium nitrate
13.2. fill-in the blank: 5 g C2H5OH + 10 g O2 --> ___ g CO2 + ___ g H2O
8/10/13.3 fill-in the blank:
a. 5 g C2H5OH + 10 g O2 --> CO2 + H2O + ___ kJ
b. 2 g NaNO3(s) --> NaNO3(aq) ; ΔH = ?
c. what is the % yield in the reaction: 5 g H2 + 10 g N2 --> 6 g NH3
8/13.4 how to differentiate between two hypothetical (assume it's mutually exclusive) chemical reactions
a. CH4 + Cl2 --> CH2Cl2 + H2
b. CH4 + Cl2 --> CH2Cl2 + HCl
based on stochiometry; include example calculation
8/13.5 application(s) of using the concept(s) in this chapter
spring semester [7 chapters]
*ch. 9. climate change (~ 2 weeks)
prepare a group report addressing the below issues.
9.1 possible determinants of climate and describe its basis
a. correlation of global temperature and
i. atmospheric carbon dioxide
ii. earth's orbit
iii. cavaet: correlation versus causation; how to differeniate between causation versus correlation ? ; e.g. Hill or Koch
c. ocean current
9.2 what is "positive feedback" ? role / examples of positive feedback in climate change
9.3 potential impact of climate change; e.g. EPA; NOAA; NASA ; potential impact on soceity; e.g. wikipedia; see pbs video
9.4 what is "manufacture confusion"; e.g. video 2021; article 2015
9.5 critique climate change mathematical model cavaet; e.g. article 2011; article 2017
*ch. 10. sea level rise; heating curve [~ 2 weeks; 14 points]
10.1 NGSS chemistry textbook; ch. 10 [12 points]
Engage: Going up: question: impact of sea level rise in SF ? basis / rationale ?
Explore / explain: phase change
Part A: Exploring phase change: Land vs. Sea ice.
Process & Procedure; # 2 (view online video in lieu of teacher demo), 3.
Stop & think; # 1, 2, 3
Part B. Explain phase change: heating curve
Process & Procedure; # 3, 5, 6
Elaborate: sea level rise
Process & Procedure; # 2, 3, 4
a. mix 50 mL water at 20 °C and 30 mL water at 50 °C; what is the "final" temperature ?
b. dissolve 2 g NaNO3(s) in 25 mL of water at 20 °C; what is the "final" temperature ?
10.3 do lab activity
ch. 11. albedo; coral bleaching; greenhouse effect
ch. 12. gas; greenhouse effect
ch. 13. burning fuel; molar mass; stochiometry
ch. 14. kinetics & equilibrium
ch. 15. water quality; Ksp; Flint water crisis (~ 2 weeks)
15.1 take notes on video about the Flint water crisis and a case study about it
15.2 chemical basis of the cause / preventation
15.3 notes on Ksp in May 2020 honors screencasts
ch. 16. ocean acidification; acid / base / pH
ch. 17. carbon cycle (skip)