Benchmark and Unit 3 Results

1. Benchmark and Unit 3 Results Chemistry Ms. Boon 10.09 & 10.10

2. Catalyst: Describe what you see in the picture. Is there a chemical reaction? How do you know? What kind? Objective: I can set goals for academic growth. I can balance chemical equations. • Agenda: • Catalyst • Benchmark Review • Balancing Equations Race! • Exit Slip

3. Notes: Benchmark Results & Review:Ouchi Chemistry Scores 5th out of 12 Alliance High Schools! Think, Pair Share: Lets set a goal as a class for the next benchmark. What can we do to reach that goal?

4. Benchmark Results! Period 2 Reflection: Is this what you expected? How do you feel about this result? Questions we should review: 10, 22, & 23 Advanced 32% • Did we meet our class goal? • 86% proficient or advanced! • Lets shoot for 100% next time! Proficient 54% Basic 14%

5. Benchmark Results! Period 3 Reflection: Is this what you expected? How do you feel about this result? Questions we should review: 15, 18, 20, 22, & 23 • Did we meet our class goal? • 54% proficient or advanced! • Lets shoot for 80% next time!

6. Benchmark Results! Period 4 Reflection: Is this what you expected? How do you feel about this result? Questions we should review: 18, 20, 22, & 23 • Did we meet our class goal? • 70% proficient or advanced! • Lets shoot for 80% next time!

7. Benchmark Results! Period 5 Reflection: Is this what you expected? How do you feel about this result? Questions we should review: 13, 22, & 23 • Did we meet our class goal? • 71% proficient or advanced! • Lets shoot for 80% next time!

8. Benchmark Results! Period 6 Reflection: Is this what you expected? How do you feel about this result? Questions we should review:15, 20, 22, & 23 • Did we meet our class goal? • 66% proficient or advanced! • Lets shoot for 80% next time!

9. Benchmark Reteach: Problem 10 Standard 1b: I can identify metals, nonmetals, and semi-metals as well as periodic table groups. Which set of elements are halogens? Helium (He), neon (Ne), argon (Ar) Lithium (Li), sodium (Na), potassium (K) Bromine (Br), iodine (I), chlorine (Cl) boron (B), aluminum (Al), gallium (Ga) Correct answer: “C” Why? “a” are noble gases, “b” are alkali metals, and “d” are group 13. “C” is group 17 which are halogens.

10. Benchmark Reteach: Problem 13 Standard 1c: I can identify and define trends in ionization energy, electronegativity, and atomic radii. 13. Electronegativity is a measure of an atom’s attraction for shared electrons in a chemical bond. Which element has the highest electronegativity? fluorine (F) sodium (Na) sulfur (S) calcium (Ca) Correct answer: “a” - fluorine Why? Electronegativity increases as you move from left to right across a period and decreases as you move down a group. Fluorine is the farthest to the right. Fluorine also pulls electrons toward it with the most force because a Fluorine atom only needs one more electron to meet the octet rule and have a full outer shell of valence electrons.

11. Benchmark Reteach: Problem 15 Standard 2a: I can compare and contrast ionic and covalent bonds. 15. Ionic bonds form when two atoms transfer outer shell electrons. transfer inner shell electrons. share inner shell electrons. share outer shell electrons. Correct answer: “a” Why? Ionic bonds are formed by the transfer of electrons from a positive cation to a negative anion. This eliminates answers “c” and “d”. The electrons transferred are valence electrons. Valence electrons are in the outer shell or energy level of the atom.

12. Benchmark Reteach: Problem 18 Standard 2a: I can compare and contrast ionic and covalent bonds. 18. Which of the following compounds contains covalent bonds? NaCl NH3 K2S Li3N Correct answer: “b” Why? Covalent bonds form between nonmetals. Ionic bonds form between a metal and a nonmetal. Both hydrogen (H) and nitrogen (N) are nonmetals (even though hydrogen is on the left of the periodic table).

13. Benchmark Reteach: Problem 20 Standard 2b: Biological and organic molecules are formed by covalent bonding. 20. Large biological molecules such as proteins and carbohydrates, are held together by Ionic bonds. metallic bonds. covalent bonds. atomic bonds. Correct answer: “c” Why? The definition of a molecule is a compound formed by covalent bonding of atoms of more than one element. Also, biological molecules are mostly nonmetals, which form covalent bonds.

14. Benchmark Reteach: Problem 22 Standard 2c: Ionic compounds. Ionic compounds are held together by The sharing of electrons Electrostatic attractions intermolecular forces The exchange of protons. Correct answer: “b” Why? “a” is incorrect because ionic bonds involve the transfer of electrons. “c” is incorrect because there are no molecules involved in an ionic bond. “d” is incorrect because no protons are exchanged. “b” is correct because electrostatic force is the attraction between the positive cations and negative anions (opposites attract!).

15. Benchmark Reteach: Problem 23 Standard 2e: I can draw Lewis dot structures of molecules. 23. How is the Lewis dot structure of PF3 different than the Lewis dot structure for BF3? There is a lone pair on the central atom in PF3. There is a lone pair on the central atom in BF3. BF3 has more electrons around the central atom that PF3. BF3 has more Fluorine atoms around the central atom than PF3. Correct answer: “a” Why? P has 5 valence electrons and B has 3. P will have a lone pair or unshared pair of electrons. Let’s draw it!

16. Practice! Chemical Bonds Vocabulary Word search Objective: I can set goals for academic growth. I can balance chemical equations. • Agenda: • Catalyst • Benchmark Review • Balancing Equations Race! • Exit Slip

17. Practice! Balancing Equations Race Objective: I can set goals for academic growth. I can balance chemical equations. • Agenda: • Catalyst • Benchmark Review • Balancing Equations Race! • Exit Slip

18. Practice! Balancing Equations Race Objective: I can set goals for academic growth. I can balance chemical equations. • Instructions: • Work independently. There is only one winner. • Work as fast as you can to balance as many equations as you can. • When you think you have balanced all the equations correctly, bring your worksheet to Ms. Boon to check. • If you have made a mistake, you must go back and check your answers. • The student with the most correctly balanced equations at the end of class will receive a prize. • Agenda: • Catalyst • Benchmark Review • Balancing Equations Race! • Exit Slip

19. Exit Slip: Bonding Review Complete the following sentences: In covalent bonds atoms ___________ electrons, in ionic bonds atoms _______________ electrons. Biological molecules are held together by _____ bonds. Ionic compounds are held together by… Electrostatic forces are the attraction between ______ cations and _________ anions. Valence electrons that are not shared in a covalent bond are called _______________.

20. Homework • Law of conservation of mass • Coefficient • Chemical equation • Mole • Molar mass • Avogadro’s number Make a Movie Poster or a “Wanted” Poster illustrating a vocabulary word from Unit 3: Chemical reaction Combustion reaction Synthesis reaction Decomposition reaction Displacement reaction