Honors Chemistry

Unit 1

Safety, Density, Atomic Structure & History

□ Welcome to Honors Chemistry

□ Safety Contract

D Safety in 208

□ Common Laboratory Equipment

□ Bunsen Burner Notes

□ Separation of a Mixture Lab

□ Classification of Matter video notes

□ Classification of Matter POGIL

□ Nuts and Bolts Lab

□ Atomic History Notes

□ A History of the Atom: Theories and

Models

□ Atomic History WS

□ Atomic Structure WS 1

□ Isotopes and Atomic Mass

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Honors Chemistry Jane Bush Twitter @jbushchemteach remind code @honbush email jbushon@olatheschools.org Google classroom @zao31c website teachers.olatheschools.com/jbushon Welcome to Honors Chemistry. This class will challenge you but will be interesting and fun. Expectations

• You are expected to do your own work, be on time, clean up your messes, treat materials, equipment, classmates, and the teacher with respect, bring your materials to class, and participate in class.

• Do not touch anything in the lab unless specifically told to do so or if you ask! • Please no cell phones unless I specifically tell you it is OK to use them. We will actually

use them on occasion! • Assignments will be delivered in a “flipped format” with lectures viewed on video and classwork

done in class to formatively assess learning. Videos will be made available on google classroom.

Required materials: • A calculator (scientific - no need for a graphing calculator unless you already have one) • A lab notebook you will purchase from the school for $15.00 • A set of colored pencils – 24-pack would be the best. They don’t have to be new! • A 3-Ring binder and maybe 20 sheets of notebook paper. This will contain all of your materials

- you will want to guard it with your life! I will provide more instructions on how to set it up. Grading: Grading will be based on class work, homework assignments, quizzes, tests, and laboratory experiments.

• Tests will account for 40% of your grade • Quizzes will account for about 20% of your grade. • Assignments will account for about 10% of your grade • Labs will account for about 30% of your grade. • Your overall semester grade will be calculated cumulative (continuous addition of points)

throughout the semester. A cumulative exam (final) will be given at the end of each semester. The final will count as a test grade.

The following grading scale will be used:

• A 90 - 100% • B 80 – 90.0% • C 70 – 80.0% • D 60 – 70.0% • F 59% and below

I do not round up grades

Cheating: If cheating occurs, parents/guardians will be contacted and the work will receive a zero. Examples of cheating are plagiarism and copying or “borrowing” someone’s lab or homework.

Make-up Work: Two days will be given for each day of an excused absence. If you are absent the

day of a test or quiz, you will be expected to take the test or quiz on the day you return. If you are going to be absent due to a school activity, all of your homework must be turned in before you leave.

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Late Work: You must get your work done on time to succeed in Honors Chemistry!!! Once an assignment, lab, quiz, or test is “expired,” meaning the unit test is over, it can no longer be handed in for any credit. I will work with you if there are extenuating circumstances.

Attendance policy: Attendance is extremely important as completed class work and assignments are essential to success in this class. You are responsible for the information covered in the class whether you are present or not. I will provide a calendar of assignments each week. You need to check the calendar for assignments covered and topics missed. USE YOUR PLANNER!

Tardy policy: Arrive on time! You are expected to be in the classroom when the bell rings. We will follow school procedure.

Hall passes: Bring your planner with you to class. You will use this as your hall pass every time you need to leave the classroom. If you do not have your planner, you will not be allowed to leave the room. One person will be allowed to leave the room at a time.

Safety: Safety is critical in this class! General rules for lab safety will be covered during class. You and your parents/guardians will sign a safety agreement. You must have your safety contract signed before you begin labs. Goggles and closed-toe shoes must be worn during all labs! Food and Drink: Snacks and drinks are allowed only when are seated at your desk. NO food or drink will be allowed during lab experiments or when you are at any of the lab tables. You are responsible for keeping the room clean. Use Eagle Halftime and Seminar! I will also be available most days before and after school, or we could arrange to meet at another agreed upon time. I would appreciate knowing in advance when you are coming in for help. Topics Covered in Honors Chemistry:

• Measurement, Accuracy, Precision • Atomic Structure • Periodic Table • Chemical Compounds • Chemical Formulas • Chemical Reactions • Chemical Quantities (Moles) and

Stoichiometry • Solutions • Acids and Bases • Gas Laws • Heat • Radioactivity

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Honors Chemistry Guidelines – DUE 8/30/19 I understand my obligations as a student in Mrs. Bush’s chemistry class including the late work policy. I have read and understand the safety guidelines for chemistry. X ___________________________ X ___________________________ Student Signature Student Printed Name I understand my student’s obligations according to this syllabus, including the late work policy. I have read and understood my child’s safety guidelines for chemistry. X ___________________________ X ___________________________ Parent Signature Parent Printed Name

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@ d'" a.:ffe-4 ut_ 208 Locate the following items in the room:

• Safety shower

• Eye wash station

• Fire extinguisher

• Fire blanket

• First aid kit

• Fire Alarm and Telephone

• Goggles/lab ware

• Glassware

• Fume hood

• Exits

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ISOTOPES AND ATOMIC MASS

MODEL 1: Make Isotopes

Open the Isotopes and Atomic Mass simulation http://phet.colorado.edu/en/simulation/isotopes-and-atomic-mass

Play with the “Make Isotopes” tab of the simulation for a few minutes and then answer the following questions.

1. What particles determine the mass number?

2. Why is mass number always a whole number?

3. One isotope of carbon (C) has exactly the same mass number and atomic mass since it was used as the definition of the atomic mass unit (amu). Which isotope is it and what is its atomic mass?

4. What is the approximate mass of one proton? __________amu

5. What is the approximate mass of one neutron? __________amu

6. Look at 3 or 4 other atoms using the simulation. Do any of them have a whole number for atomic mass?

MODEL 2: Mix Isotopes

Play with the “Mix Isotopes” tab for a few minutes, then answer the following questions.

1. What are the factors that affect the average atomic mass of a mixture of isotopes?

2. Beryllium (Be) and Fluorine (F) have only one stable isotope. Use the sim and the periodic table to complete the following table:

Element Mass of 1 atom Average mass of 2

atoms (sim) Average mass of 3

atoms (sim) Atomic mass

(periodic table)

Beryllium (Be)

9.01218 amu

Fluorine (F)

18.99840 amu

3. Why are all the values in each row of the table above the same?

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4. Lithium has only two stable isotopes. Use the sim to determine the following: a. Atomic mass of lithium-6 = __________________amu b. Atomic mass of lithium-7 = __________________amu c. Average atomic mass of a sample containing three lithium-6 atoms and two lithium-7

atoms. ______________amu d. Is the average atomic mass you just determined closer to the mass of lithium-6 or

lithium-7? Explain

5. Describe a method to calculate the average atomic mass of the sample in the previous question using only the atomic masses of lithium-6 and lithium-7 without using the simulation.

6. Test your method by creating a few sample mixtures of isotopes with the sim and see if your method correctly predicts the average atomic mass of that sample from only the atomic masses of the isotopes and the quantity of each isotope. Use the table below to track your progress.

Element Atomic mass and

quantity of each isotope

Average atomic mass of sample

(calculate yourself)

Average atomic mass of sample (from simulation)

MODEL 3: Nature’s mix of isotopes

1. Using the sim, examine “Nature’s mix of isotopes” for several different elements. If you

assumed 100 total atoms in a sample, how could you relate the % values shown in the sim into a number you could use for your calculation of average atomic mass?

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2. Calculate the atomic mass of each of the following elements using your method from above. Test your answer using the Nature’s mix of isotopes and the periodic table. Keep going until you can get two in a row right.

Isotope 1 Isotope 2 Isotope 3 Check answer

with sim

Element Mass

(amu) %age

Mass (amu)

%age Mass

(amu) %age

Calculated average

atomic mass (amu)

Yes No

Hydrogen 1.007 99.98 2.01410 0.011 - -

Silicon 27.97 92.22 28.9764 4.685 29.97377 3.092

Nitrogen 14.00 99.63 15.0001 0.364 - -

Argon 35.96 0.336 37.9627 0.063 39.96238 99.60

Calculations / Rough work:

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EXERCISES 1. Titanium has five common isotopes:

46Ti (8.00%), mass= 45.953 amu 47 Ti (7.80%), mass= 46.952 amu 48Ti (73.40%), mass= 47.947 amu 49Ti (5.50%), mass= 48.948 amu 50Ti (5.30%), mass = 49.945 amu

Calculate the average atomic mass of titanium.

2. The atomic mass of boron is 10.81 amu. Boron has two isotopes: Boron-10 has a mass of 10.01 amu. Boron-11 has a mass of 11.01 amu. What is the %age of each isotope in boron? (check your answer with the simulation)

3. A certain sample of rubidium has just two isotopes, 85Rb (mass = 84.911amu) and 87Rb (mass = 86.909amu). The atomic mass of this sample is 86.231 amu. What are the percentages of the isotopes in this sample?

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