DRILL What property does its slope represent? Calculate the slope. 80 70 60 Mass (g) Look at the line graphed over there 90 50 40 30 HW: Chem & Phys Changes Lab Questions 20 10 0 0 20 40 60 Volume (mL) 80 OBJECTIVES IWBAT Classify matter and explain how matter may change. Differentiate between chemical and physical changes and properties Calculate density Summarize and apply the Law of Conservation of Energy Find or calculate atomic mass, atomic number, number of protons, neutrons, and electrons, charge, etc. for any atom UNIT 2 QUIZ You need: Pen or pencil Calculator You will have 20 minutes to do the quiz. Pick up Chemical and Physical Changes Lab when done. LAB NOTES Experiment: 1. The test tube clamp is the small one. Tilt the test tube when heating. 2. DO NOT HEAT. Use the cleanest test tube. Use the smaller piece of Mg. Don’t bother with measurement—just cover the Mg with HCl. 3. NO TEST TUBE. Use the larger piece of Mg. Use the silver tongs and place the Mg near the top of the light blue cone of flame. MORE LAB NOTES 4. Use ONLY a pinch of table salt. Make sure you DON’T use sugar. 5. Do NOT breathe the smoke. This will destroy the test-tube—when it’s cool, throw it away in the broken glass container. 6. Use the cloudiest test tube. DO NOT HEAT. LAB SAFETY & NOTES Write in pen! Goggles on at all times Hair tied or pulled back No food, drink, or gum in the lab CAUTION: DO NOT STARE DIRECTLY AT THE LIGHT GIVEN OFF BY THE MAGNESIUM RIBBON CAUTION: Metal close to the burner flame can be very hot – DO NOT TOUCH CHEMICAL & PHYSICAL CHANGES LAB Work through the steps of the lab. Today is the day for the lab! We will NOT have time next class, so work quickly, efficiently and safely! LAB PARTNERS-4A Abrams, Alex C. Acker, Benjamin P. Atkinson, Sydney L. Austin, Jacob A. Blanco, Andrew J. Braimoh, Eunice I. Bundy, Nina A. Byers, Frankie T. Chalfant, Andrew N. Chaudry, Salma F. Farrell, Avery A. Gabriel, Nathan R. Gildersleeve, Ryan N. Havrilko, Ava H. Hayes, Harrison F. Irby, Erik D. Keh, Samuel J. Kim, Selim Lawrence, Destiny C. Majid, Mariam Montanaro, Kaden Patel, Jainik S. Rahman, Ayad A. Regal, Sarah L. Stern, Emily R. Weaver, Samuel J. Wieprecht, Tesia R. LAB PARTNERS – 4B Abdou, John A. Acker, Natalie R. Kavalsky, Hanna L. Chen, Yuxin Crisco, Leah A. Desai, Shriya R. Goldberg, Aaron R. Gonzalez, Miguel A. Hawkins, Emily C. Kukata, Sumanth McLane, Catheryn C. Mumper, Grace J. Nilles, Andrew I. Puhl, Anthony D. Raskin, Sasha E. Samuels, Andrew R. Simmons, Ryan T. Stokes, Emily F. Withers, Ariana P. DISPOSAL/CLEAN-UP The cloudy waste goes into a waste container. Do NOT put the wood or metal into the sink Wood and metal go into trash, once they are cool. The test tube with the sugar will get ruined after it is heated Place it into the cardboard box labeled GLASS once it cools off IODINE—HEATING & COOLING http://www.youtube.com/watch?v=4fAOI6 BeMZY ~1:25-2:30 This is a time-lapse video, so it is much faster than it would have happened in real life. Work on the questions for a few minutes. STARTING UNIT 3! What is an atom? ion? isotope? proton? neutron? electron? What does all this mean?? Let’s do some Atomic Structure notes CLOSURE What is the most common isotope of mercury? How many protons, neutrons, and electrons would a neutral atom of “standard” mercury have?