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ESSENTIAL UNIT 2 (E02) (Scientific Measurement and Atomic Structure) (June 2011)

Unit Statement: Unit two presents the student with methods of measuring scientifically, including significant figures, SI units, and conversion problems. The unit also explores the history of the development of various atomic models from Democritus to the Rutherford model. The student is also presented with the concepts of atomic mass, atomic number and isotopes. Essential Outcomes: (must be assessed) 1. The Student Will write numbers using correct scientific notation in calculations. (p. 66-71) 2. TSW compare and contrast accuracy and precision. (p.64) 3. TSW solve problems, reporting the result using correct significant figures (p. 66-71) 4. TSW accurately measure a variety of items correctly using SI units including length, mass, volume, temperature, (p. 73-79) 5. TSW determine density of three different objects using data obtained by measurement. (p. 80-82) 6. TSW solve problems using conversion factors. (p. 84-85) 7. TSW accurately solve problems using dimensional analysis. (p. 87-91) 8. TSW summarize the early models of the atom. (p. 102-109) 9. TSW contrast elements and isotopes. (p. 112-114) 10. TSW calculate the atomic mass of an element. (p. 116-119) Introduced and Practiced Outcomes: 1. The Student Will explain why metric units are easy to use. (p.74) 2. TSW calculate percent error. (p. 65) 3. TSW identify the three types of subatomic particles. (p. 105-107) 4. TSW explain how isotopes of an element differ. (p.114-115) 8 QSI CHEMISTRY SEC E02 Copyright © 1988-2011

Suggested Materials: PC Chapters 3 and 4 plus selected laboratory materials and equipment. Pearson Chemistry Reading and Study Workbook (Abbreviated RSW) Pearson Chemistry Classroom Resources DVD-ROM (Abbreviated CR) Pearson Chemistry ExamView CD-ROM (Abbreviated EV) Pearson Chemistry Virtual Chemistry Lab (Abbreviated VCL)

Suggested Unit Resources: 1. 2. 3. 4. 5.

Quick Lab “Accuracy and Precision” (PC p. 72) TSW 1-4 Small Scale Lab “Now What Do I Do?” (PC p. 92) TSW 1-7 Practice Problems (PC p. 95-98) TSW 1-7 Small Scale Lab “The Atomic Mass of ‘Candium’” (PC p. 120) TSW 9-10 Practice Problems (PC p. 122-125) TSW 8-10

Suggested Technology Resources: Destiny Web Path Express (found on school’s automated library system) www.pearsonchem.com www.chemtutor.com www.chemistryhelp.net http://www.khanacademy.org/ http://phet.colorado.edu/ Virtual Lab number 4 “Thomson Cathode-Ray Tube Experiment” (VCL) Virtual Lab number 5 “Milikan Oil Drop Experiment” (VCL) Virtual Lab number 6 “Atomic Structure: Rutherford’s Experiment (VCL)

Suggested Assessment Tools and Strategies: 1. Review worksheets and study guides (RSW pages 27-58) 2. Quizes and worksheets (CR) 3. Teacher generated tests (EV)

9 QSI CHEMISTRY SEC E02 Copyright © 1988-2011

TSW 1– Scientific notation 2– Accuracy/ precision 3– Significant figures 4 – SI units 5 – Density

6– Conversion factors 7– Dimension al analysis

‘A’ Level Mastery

CHEMISTRY E02 (Secondary) Suggested Rubric ‘B’ Level Mastery The student can write numbers in correct scientific notation.

The student can design an analogy to compare and contrast accuracy and precision.

The student can determine the density of at least three different items using the correct SI units, scientific notation, and significant figures. The student can solve problems using conversion factors and report answers using correct SI units, scientific notation, and significant figures. The student can accurately solve multiple step problems using dimensional analysis and report answers using correct SI units, scientific notation, and significant figures.

The student can compare and contrast accuracy and precision. The student can solve problems and report the answer using the correct number of significant figures. The student can measure a variety of objects using the correct SI units. The student can determine the density of at least three different items.

The student can solve problems using conversion factors.

The student can accurately solve problems using dimensional analysis.

8 –Atomic The student can summarize the early models models of the atom. 9– The student can contrast elements and Elements/is isotopes. otopes 10 – The student is able to solve complex The student is able to calculate the problems involving masses of isotopes atomic mass of a given element. of given elements. (See questions 7879 on page 124 in PC) • To receive an ‘A’, the student must show ‘A’ level mastery in at least 4 of the 5 available TSW’s and ‘B’ level mastery on all of the remaining TSW’s. • To receive a ‘B’, the student must show ‘B’ level mastery on all ten TSW’s.

10 QSI CHEMISTRY SEC E02 Copyright © 1988-2011