This is the Blog for my 2nd period Block "A", Chemistry Class for the 2017-18 school year at George Washington High School. We meet every other school day starting 9/5/2017.

FINAL EXAMS: FINALS COUNT AS TWO EXAMS. The final exam schedule follows Memorial day and is as follows: Tues 5/29 Periods 1 and 7, Wed 5/30 Periods 2B and 6, Thur 5/31 Periods 2A, 4/4a and 4/5a, Friday 6/1 Periods 3/3a, 3a, 4 and unscheduled "B" days, Monday 6/4 unscheduled A days and Make-ups.

5-29-18: Students are preparing for their final exam to be given according to the schedule above. The final exam is multiple choice, Ch 1-8. Prepare by reviewing key terms, notes, reference packs, and the multiple choice questions that appear at the end of each chapter, titled "standardized test prep".
Here are the answers to those questions: Chapter/Page: 1/35: CCDAD BCCAB, 2/71: BCDCB CABBAB B, 3/113: BDCAB ACCDB D, 4/155: CBAAA DCCAB D, 5/187: DBCDC DACBC DA, 6/221: AACCB CDABD BC, 7/257: BCABD CABCB CB, 8/299: DBBBB AAABA DD, 9/335: DAAAC DABCC C

5-24-18: We completed the video. Worksheets are due. I demonstrated and discussed a solid state phase transformation in iron wire.

5-22-18: We continued Cosmos, "The Clean Room" to 28:15 (On the new DVD with subtitles and no commercials). We discussed Lead in consumer goods and I mentioned Thomas Midgley who has been called the single most harmful organism on earth who ever lived.

5-18-18: We began a video featuring the work of Dr. Claire Patterson titled "The Clean Room", Episode 7 from the Cosmos - A spacetime odyssey series and got to 14:51

5-16-18: Students received two full size papers containing three articles about Dr. Clair Patterson and a strip of paper with 5 prompts. Students are assigned to read the articles and submit responses to the prompts.

5-11-18: A shorter period due to the school safety assembly following yesterday's lockdown. We began to discuss the activity series. I demonstrated the Al + CuCl2 reaction after predicting its products. We solved CRWS 8.3 #10-15.

5-9-18: We played "Chemical Reactions Breakout"
We reviewed the solution. I checked Key Terms for chapter 8. I prepared then demonstrated and discussed the reaction of the explosive, nitrogen tri-iodide. We also watched this reaction on "The World of Chemistry" episode #8 (Chemical bonds).

5-7-18: We completed our review of the problems from P. 269-271, and 273. Students received credit toward grade for working/solving the three practice problems on page 273. for solving the Students are to complete full page worksheet by balancing and classifying the 15 equations on one side of the sheet. For extra credit they can do also solve the word problems on the reverse side. I discussed and demonstrated the Thermite reaction. Key terms for chapter 8 have not yet been checked but will be next period. We will have a quiz on balancing equations during our next class.

5-3-18: Shorter period due to half day report card conference schedule. We continued lessons on balancing a classifying chemical reactions. We saw the complete demonstration of the silver nitrate reaction from 5/1. Students are to continue with problems from the full page balancing equations worksheet and problems from p. 269, 271, and 273.

5-1-18: We reviewed and I checked the 1/2 sheet on classifying reactions. I handed out a full sheet of unbalanced word and equations (15 each) and we classified the equation side. I demonstrated the Silver Nitrate + Copper single displacement reaction under a microscope. We ran out of time before a complte study of it was complete.

4-27-18: Short period due to half day schedule: Students we provided a half sheet worksheet covering classification of reaction equations. We reviewed some of the this page. The half sheet is to be submitted for grade and is assigned to be completed as HW. Also due for HW is CRWS 8.1 #1-11, the first section of the Chapter 8 package. I will check this next class (do not submit the package because you can use it for the exams).

4-25-18: I performed demonstrations with Liquid nitrogen. These included an exploration of thermal expansion, water content in air, liquid oxygen, compression and expansion of gases with temperature changes, endothermic phase changes, and temperature measurement scales. We discussed frostbite after two students challenged themselves under supervision to experience the severe cold of just a fraction of a second too long of finger tip contact. Others quickly removed pieces of a twizzler from a small bowl half-filled the cryogenic liquid without experiencing any discomfort or pain. And since smoking is bad for you, students were not permitted to eat the twizzler (made crunchy by the cold) until it stopped "smoking". We learned about Dewar Flask used to store liquid nitrogen.

4-23-18: Our class was displaced by career day sessions. We will continued with chapter 8 lessons on 4-25. Students who were not 11th graders who selected or were assigned to specific career sessions were expected to attend the session I proctored in rm 410.

4-19-18: We began a new Unit: Chemical Reactions (Text Chapter 8). I handed out the CRWS pack for chapter 8 and students were to complete 8.1 #1-3 on that pack as a do-now. Students are asked to write Key Terms due Monday. We began to explore the University of Colorado's Phet Simulation "Reactants, Products, and Leftovers", and "Balancing Chemical Equations" , "Reactions and Rates" See reference link #89. We examined symbols used in chemical reaction equations. Students solved CRWS 8.1 #11. We discussed classifications of reactions and students matched 5 types of reactions with their formats. I demonstrated the decomposition of hydrogen peroxide and the double displacement reaction of vinegar and baking soda. As an exit ticket for grade, students were to write something they learned today and something they want to know based on the unit introduction.

4-17-18: We reviewed the chapter 7 problems then had a 2-problem quiz covering calculations used to determine empirical and chemical formulas. I gave credit toward grade for students who had worked most of the problems on CRWS 7.1, 7.2, and 7.3. We will begin a new unit on chemical reactions next time we meet. For HW due Monday, students are to write the key term definitions for Chapter 8.

4-13-18: Students are required to complete for grade CRWS 7.1 #1-10 & 7.3 #11-15. Students should be comfortable with all the problems from CRWS 7.1 and 7.2. We took quiz covering four of the problems from chapter 7.

4-11-18: Students were asked to solve P. 248 #7. We reviewed this and P. 232#1. These are the type of problems that will be on a quiz we will have next time we meet. Make sure you have a legal (Non-cell phone), calculator.

4-9-18: I checked a reviewed key terms. I handed out CRWS 7.3. We solved several %composition problems (See #11-15 on the sheet and sample problem I on page 247).

4-5-18: We examined percent composition and use of molar mass and avagodros number as conversion factors. I forgot to check key terms due to the assembly. They are due Monday.

4-3-18: We reviewed unit material and continued the chapter 6 exam on covalent bonds. Key terms for chapter 7 are due Thursday for HW.

3-27-18: I was out on funeral leave. Students were given the CRWS covering chapter 7 eventually to be completed for grade after will meet again following the spring break.

3-23-18: We reviewed problems covered by the exam. Students began the chapter 6 exam. Those who did not finish can complete it on Tuesday. I also checked the HW (completion of the chapter 6 pack). We will go over any questions students had ont his pack before the exam is completed.

3-21-18: Snow day - No school

3-19-18: Students were given an article and some prompts on Dihydrogen Monoxide to complete and submit for grade while I was out for a medical procedure. The exam will be our next class period.

3-15-18: We completed lessons on Chapter 6 items. Students are to finish CRWS 6.2 and the problems from p. 202, 203, and 205 for HW. Our chapter 6 exam will occur on Monday or Wednesday next week following a review.

3-13-18: We reviewed the work that students were supposed to do last week. Many obtained/submitted it today. We went over CRWS 6.2 #1-10. Students were asked to construct the Lewis Structures for the practice problems on page 203. I checked this in class and students who showed work received credit for these problems.

3-5-18 to 3-9-18: We had a snow day 3/8. The other days, I was out due to hospitalization/illness and am returning 3-12. During my absence, student were provided with board work (3-5) and work from the substitute which I collected over the weekend. This class met three times this week.

3-1-18: I checked all work from chapter 5, and key terms for chapter 6 as credit toward grade. We reviewed CRWS section 1 for chapter 6. Students are to preview section 2.

2-27-18: Not enough students did the HW so I did not check it or review it. Instead we reviewed chapter 5 by going over Page 187 #1-13. Then we had the chapter 5 quiz. Students are to complete CRWS 6.1 (#1-23) and write key terms for chapter 6 for HW. I will check all missing chapter 5 assignment during our next class in additon to checking the HW.

2-23-18: We are holding off on the quiz until the class is full again (congratulations to our DECA students). Students received the CRWS pack for chapter 6. We reviewed the figures on page 194, 195, and 197. Students are to complete CRWS 6.1 #1-23 for HW. Key terms for chapter 6 are due Thursday next week.

2-21-18: We reviewed the HW and I checked it for grade. Attendance was poor due tot he Deca trip so we did not have our chapter 5 quiz.

2-16-18: We reviewed text p. 180 #7 & 8. I did not check the HW. I will check it and review it next class and we will also have our quiz.

2-14-18: We reset our learning of chapter 5 lessons, reviewing from the start of the chapter as we approach the quiz. I did not check HW as we had a shorter period due to town hall schedule. We discussed practice problem 1 on text page 180.

2-12-18: We reviewed CRWS 5.3 #32 to 51. Students are to complete the second side of the supplemental worksheet titled "Formulas with Polyatomic ions". Both 5.3 and the WS reviewed in class will be checked for grade on 2/14. We will have a quiz covering that material after that check. For extra credit, students can find more rules for naming polyatomic ions using roots, prefixes and suffixes; including but not limited to the prefixes for hydrogen.

2-8-18: No class due to Eagles Superbowl victory parade. Go Birds!!!

2-6-18: Nobody did the HW!! We went over example problems on that sheet. Students are expected to complete it by the next class meeting. We also completed World of Chemistry video #8 (up to the last question). Students were asked to submit the worksheet as credit toward to grade.

2-2-18: We reviewed the HW and students received credit toward grade. I handed out the second worksheet. For HW, students are to complete "Writing Binary Formulas" (one side of the new WS). We also watched a TED talk ("dead duck") and discussed the upcoming "Science on Saturday" lecture on synthetic muscles for space travel.

1-31-18: With interrupted lessons and scattered attendance due to morning assemblies, I decided to discuss my lunar observation last night (Supermoon followed by an eclipse). I would have checked HW (CRWS 5.3 #1-31, followed by a textbook exercise, P180 #6 & 7); but instead supplemented my lesson with a video that does a much better job then I do at explaining colors in the skylink, the Walter Lewin video, is better):
Paul Hewitt (City College of San Francisco) on why the sky is blue at day and red at sunset:
Walter Lewin (MIT) video on the same topic but with better demos starting at 27:50:

1-29-18: We reviewed CRWS 5.3 #1-8 and some of #9-31 which students must finish for HW. We also began watching World of Chemistry #8 "Chemical Bonds" and students were given a video worksheet to complete as the video played. We got up to the melting of salt demonstration in the video which I performed in class just before dismissal.

1-25-18: We reviewed the properties of ionic compounds and I cooked a hot dog using them!. Class was short due to class pictures so we spent the downtime watching funny, science-based scenes from the film "Monty Python and the Holy Grail" (She's a Witch...).

1-23-18: Students took the midterm exam after a brief review.

1-19-18: We completed our review of CRWS 5.1 and students received credit toward grade for having it complete. Students wrote the five properties of ionic compounds and I began to demonstrate them. We examined electrical conductivity of metals and water solutions. We also created an ionic salt by opening up and then "burning out" an incandescent light bulb.

1-17-18: We discussed he PPPL lecture from the past weekend and I offered a way to see the lecture from a computer at home using the remote viewing link and tweet link to ask the speaker questions. I showed the video "Star Power" at : The midterm exam, covering material from the beginning of the course will be Tuesday 1/23.

1-12-18: We talked again about the PPPL, "Science on Saturday" lecture series that begins tomorrow. Be there by 8:30 to get your seat in the lecture hall otherwise you will be in the lunchroom watching from remote screens. Extra credit is offered for proof that you were there. We continued CRWS 5.1 and got through #8. We also examined items with a digital microscope and told a few chemistry jokes.

1-10-18: We had a shorter 30-minute period due to keystone texting. I checked the HW. We examined electron neutrality by studying the formulas for Sodium Borate and other cation/anion combinations. We began a review of the HW CRWS 5.1 and go to # 2.

1-8-17: Back to school after break and a couple of snow days. I checked HW (Key terms for chapter 5) and added a tenth term, "Simple Ion". Students received the CRWS pack for chapter 5 and the yellow periodic table we will use for the remainder of the course. We examined the common ion table on text page 831 that was copied onto the back of the yellow periodic table. I checked key terms for chapter 5 as credit toward grade. Students are required for HW to complete CRWS 5.1 #1-16. I performed Berzelius' bead test of 1812 using sodium borate and wire.

12-22-17: With reduced classroom attendance due to holiday activities around the school, we watched a twilight zone episode ("Living Doll") and the feature film "Coraline", while other students performed make up work.

12-20-17: Students took the chapter 4 exam. Two extra credit questions were offered as an additional letter grade on the exam. We began watching "Free Range Chemistry" and got to #6 (Coal Gas vs. Hydrogen). A worksheet was handed out with this video. Key terms for chapter 5 are due after the holiday break.

12-18-17: We went over CRWS 4.3 and students received credit toward grade for its completion. Students also wrote a constructed response on property trends within the table and created a graph of density trends across the 4th and 5th period elements. The chapter 4 exam will be Wednesday 12/20.

12-14-17: I attended an all-day, in-school professional development on the topic of "writing across the curriculum". Students were required to read an article on "Fusion Power" and submit responses from 9 prompts for credit toward grade. Additional time should have been spent on completing the Chapter 4 review pack.

12-12-17: Students were given a quiz on element groups on the Periodic Table just to see what students knew (We will relearn it and retake it if scores are too low). We played a game of Kahoot covering property trends on the periodic table. Students also formed groups and performed the Mendeleev lab of 1869, organizing a periodic table and using element properties to identify nine unknown elements. For HW students are to complete CRWS 4.3. Students also received a word search puzzle and blank periodic table to fill in for extra credit as a way to become more familiar with the elements and groups on the table. The extra credit is due anytime before the holiday break.

12-8-17: We discussed ionization energy, specifically why this property increases for carbon's first through fourth ionization energy and why the fifth ionization energy of carbon is so much greater.

12-6-17: We continued going over sections 4.1 and 4.2 of the concept review worksheet (CRWS) pack for chapter 4. Students received credit toward grade for completion of CRWS 4.1, 4.2, and the periodic table group name chart on the back of the (A through K) group

12-4-17: Students were asked to list each of the element properties described in text section 4.3 along with their general trends as they go across rows of the periodic table and as they go down columns of the table. We discussed ionization energy and electronegativity. I checked but did not review the HW.

11-30-17: I checked and reviewed CRWS 4.1. We also completed the group name chart (naming groups A-K) on the back of the chapter 4 pack. We reviewed properties of many of the groups of elements. We discussed groups like the semiconductors and transition elements which do not have similar valence electron configuration but do have similar properties. As so few had done the HW from 11-26, it is reassigned for 12-4: Students are to complete CRWS 4.1 and 4.2 for homework and have the group name chart (naming groups A-K) completed as well.

11-28-17: We completed the video and I collected the WS for grade. We completed the material covering CRWS 4.1 and discussed details on the contributions of Dobereiner, Newlands, De Chancourtois, Mendeleev, Moseley, and Seaborg. Students are to complete CRWS 4.1 and 4.2 for homework. Next class I will check these sheets for completion and we will review them.

11-22-17: Shorter period due to report card conferences (half day schedule). We continued WoChem video #7 to 16:34 and discussed glass making.

11-20-17: We reviewed CRWS 4.1 #1. Checked progress on CRWS Ch 4 for grade. Checked Key terms Ch 4 for grade. Showed the Higgs boson video discussed superheavy elements. We examined the reactivity of sodium metal.

11-16-17: I attended an all-day, in-school professional development on the topic of "writing across the curriculum". Students were provided a stapled pack containing the publisher's concept review worksheets for chapter 4 (CRWS Ch 4). They were asked to use the text to complete as much of the package as possible. This package is to be kept as part of your notebook and may be used on the next unit exam.

11-14-17: We began Chapter 4, a new unit on the periodic table. Students received a video sheet for "The World of Chemistry - Episode #7, The Periodic Table" (See reference link #3). Our class was shortened due to a fire drill. We discussed the importance of writing professionally and watched the Weird Al parody video, "Word Crimes". We got to 6:22 into the video. Since I will not be in class Thursday, (there will be a grades written assignment). Chapter 4 Key terms will be due on Monday November 20th.

11-9-17: We completed the Bill Nye Video today and students submitted the video WS for grade (sections 1-11 only). We watched a short video on the Becquerel/Curie experiment then took the chapter 3 exam. Key terms for chapter 4 are due Thursday next week Monday, November 20th (I will be in the building but not in class Thursday) . Students who did not have Dalton's 5 principles memorized for the exam will have to submit them written 5 times each by end of day. If you missed the exam, the last day you can take it is Monday in order to have it count on your printed report card grade. The exam grade can be entered after Monday into term one but will not count toward the first printed report card grade.

11-6-17: We will have our chapter 3 exam on Thursday. Students had the option of completing part one of the exam today (writing Dalton's 5 principals from memory or 5x each). The exam will cover the following items: Dalton's 5 principles (memorize or write 5 x), parts of the atom, atomic theory timeline, the electromagnetic spectrum, and electron configuration. Students will be permitted to use their reference sheet for the exam.

11-2-17: I was absent for a medical issue. Students were given an article to read from the Wall Street Journal with seven prompts to answer as credit toward grade. Within those prompts was an extra credit assignment. Students who did not receive the materials in class can get them here.

10-31-17: Students received credit toward Grade for having the Atomic Theory timeline complete. We examined electron configuration notation and diagrams. Students received additional credit toward grade for completing the "Electron Configuration Penny Activity". As an alternative assignment for those who missed class, students must write the three electron configuration rules *Aufbau, Pauli, and Hund's) in simple language (copied from a classmate's notes) and then write the electron configurations notation and create a diagram, like that on text page 98, for the atoms of Iron and Oxygen.

10-27-17: A short day due to half-day schedule. Students received credit for their marked up periodic table. We began to review electron configuration notation.

10-25-17: We completed the Atomic Theory Timeline in the chapter 3 reference pack. We began to discuss electron configuration but did not yet mark up the pink periodic table as required. We examined page 119 of the book to begin a more detailed study of electron configuration. I forgot to check the HW (will now be due Friday)

10-23-17: We observed bright light spectrum for various elements using spectrum tubes and spectrophotometers. All students were handed diffraction gratings to observe spectra as well. We watched a short song video on light We reviewed CRWS 3.2 1-11. For HW students are to complete #12-17 on that sheet. Today is "Mole Day" make a mole for extra credit using instructions from assignment #31.

10-19-17: I was attending a seminar at the Franklin Institute. Students were required to create then submit for grade a favorite food data journal to allow scientific comparisons of their favorite foods using "Scott's Pizza Tour Journal" as a model. Students were also given two-word search element puzzles.

10-17-17: Students completed an activity on names and symbols of isotopes (1/2 sheet) as credit toward grade. We examined the University of Colorado phet simulation on nuclear fission to examine the behavior of uranium-235, 236, 238, and 239).

10-13-17: We continued our start of the chapter 3 material. Students received credit for their grade for completing the homework (key terms) and an element name and symbol sheet they completed as a do-now and submitted as an exit ticket. We watched videos of several periodic table songs (Reference link #59). We discussed how atoms were arranged by rows and orbital blocks (s,p,d,f) on the table. We discussed the origin of many element names. Students received the "Pink" periodic table for later use in class. We also began the Bill Nye video, "Greatest Discoveries in chemistry" (reference link #27) for which a "Stop and Jot" video sheet was distributed. We will finish this in class. Students were offered three extra credit assignments: 1 - Download the EMD PTE periodic table app., 2 - Visit the Chemical Heritage Foundation museum (Reference link #68), and 3-Play Little Alchemy create 200 of the possible 580 elements (See Assignment link #55).

10-9-17: We began Chapter 3. Students received the CRWS pack for chapter 3. Students were asked to write Dalton's 5 principles from p 78. I gave credit toward grade for doing so. We also reviewed parts of the atom and students received another classwork grade for creating a table of atomic parts (protons, neutrons, and electrons) and thier properties (name, location in the atomic structure, charge, and mass iin Atomic Mass Units).

10-5-17: Students took a pre-learning assessment on atoms and the periodic table. This is a credit/no credit assignment that only requires a student to read and answer the questions as best they can to receive credit. The score does not matter, only the submission of the assessment. When retaken in the spring, it will be possible to demonstrate that major course learning objectives were achieved. Students then created a table of properties for subatomic parts of the atoms (protons, neutrons, and electrons). 23 key term definitions for chapter 3 are due next Friday.

10-3-17: Students sat for the unit 1 exam covering chapters 1 & 2 in the textbook. It was open notes, closed book. For HW students are to write the key term definitions for chapter 3.

9-29-17: We reviewed temperature scales and conversion equations. We spoke about specific and latent heat. We have covered all the material for unit 1. Students should prepare for an exam covering chapters 1 & 2 in the text as well as material gone over in class. Notebooks should be organized for easy reference and a graded notebook check.

9-27-17: I graded and reviewed the HW. I handed out a sheet with sample exam questions and a graphic organizer for matter and energy. We discussed and classified types of energy. I demonstrated chemical potential energy (big bang cannon) and mechanical energy transformations (bowling ball pendulum).

9-25-17: I graded and reviewed the HW. We completed #12-14 on page 19. We measured the density of liquids and discussed how the density of gases are measured. Students saw samples of Dead Sea water and we saw images of people floating high up in Dead Sea water. Our measurement of dead sea water density and subsequent calculations confirmed the phenomena observed in the images. We reviewed the "Factor Unit Method". For HW: Students are to read and complete the three problems on the sheet in the Math pack titled "Converting between US conventional and SI measurements".

9-19-17: Students were asked to solve #12-14 on page 19. We reviewed just problem 12 when I realized that the class was not proficient in using the metric (SI) system of measurement. I distributed a three-page "Math Pack" and began to review the last page featuring a graphic that shows the system of prefixes while discussing the metric system. We also began to solve related problems on the Metric Measurement Conversions worksheet which students are to complete for HW. As a surprise bonus, we studied some samples of dry ice, solid carbon dioxide (CO2). We saw its sublimation to gas and how it dissolves in water to make an acid (as demonstrated by a colored indicator). Some students recognized its odor as that in carbonated beverages. We also created a bomb (behind a safety shield, of course) using a closed water bottle, pressurized by the CO2 gas.

9-15-17: For classwork grade, students were asked to create a bar graph of the liquid and solid densities of the materials found in Figure 4 on page 17 of the text. We began a discussion on accuracy and precision.

9-13-17: Students were asked to complete CRWS 1.2 #1-5 which discussed in class. Students then were asked to examine figure 5 on page 381 (the phase change triangle). We discussed endo and exothermic phase changes. I demonstrated a "Hot pack" made from a supersaturated, supercooled sodium acetate solution to show how heat is released as solid forms from a liquid. I also demonstrated the sublimation and deposition of iodine crystals.

9-11-17: I distributed the publisher's concept review worksheet (abbreviated "CRWS" from this point forward) covering chapter 1 and students were asked to solve section 1 #1-23 which we reviewed in class. Students submitted the methane mamba lab report. I checked HW, the list of 23 key term definitions for chapter 1, numbered and underlined (or highlighted). The on-time deadline for this assignment is extended to our next class on Wednesday.

9-7-17: Students submitted their HW for a grade. They received a sheet on reading skills, "Getting to know your textbook" which asks questions about the textbook and conclude with a key term definition list for the chapters. Key Terms for chapter 1 are due as a homework grade. I will check this on Monday but will also be accepted without late penalty on Wednesday. I demonstrated the Methane Mamba and students were asked to consider the equipment and procedure to perform this demonstration safely. For HW write a mini lab report on the Methane Mamba Report: 1 - Title, 2- Equipment list (with assembly drawing), 3 - Step by Step procedures, 4 - Observations, 5 - Safety precautions (Safety First). This will be due Wednesday 9/13. Those who missed the demonstration can complete Item 30 from the Assignments/EC link on the left. Students who missed the demonstration can submit Assignment/EC #30 form the tab on the left titled "Discrepant Event"

9-5-17: First day of class. I hope you felt welcome and enthused about the subject. Students received a hard copy print of the syllabus to keep in their notebook and were assigned seats. Note: The syllabus is available in digital format as item #1 on the tab titled "Assignments /EC" on the left. Your homework tonight is to Complete the two-part prompt handed out in class.