1. Use these slides to quiz your knowledge of 1 st Semester Stuff!! The first slide is the “quiz” the slide that follows you will find the answers

2. Sig Figs How many sig figs? 1.6.751 g 2.0.157 kg 3.28.0 mL 4.2500 m 5.0.0067 g

3. Sig Figs How many sig figs? 1.6.751 g4 2.0.157 kg3 3.28.0 mL3 4.2500 m2 5.0.0067 g2 To Review Sig Fig Rules see “Problem-Solving Strategy” p. 51 in Red Book **Click for a tutorial video on Sig Figs

4. Periodic Table Stuff Atomic number = position on table (what does the number tell you?) Atomic mass – what makes up this mass Isotopes – What are they?

5. Periodic Table Stuff Atomic number = position on table (what does the number tell you?) The number of protons in the nucleus Also, ID’s the element on the periodic table Atomic mass – what makes up this mass Number of protons + number of neutrons Isotopes – What are they? Atoms with the same number of protons but different number of neutrons

6. Element, Compound & Mixtures? Indicate which of the following is an element, compound, heterogeneous mixture or solution: 1.Ocean water 2.Calcium 3.Vitamin C 4.Dry ice (solid CO 2 ) 5.Copper 6.Grain alcohol 7.After-shave lotion

7. Element, Compound & Mixtures? Indicate which of the following is an element, compound, heterogeneous mixture or solution: 1.Ocean waterheterogeneous mixture 2.Calciumelement 3.Vitamin Ccompound 4.Dry ice (solid CO 2 )compound 5.Copperelement 6.Grain alcoholsolution or compound 7.After-shave lotionsolution

8. Physical & Chemical Properties Classify each as a chemical or physical property: 1.Reacts with water 2.Is red 3.Conducts electricity 4.Resists corrosion 5.Boils at 88 o C 6.Is 1.5 m long

9. Physical & Chemical Properties Classify each as a chemical or physical property: 1.Reacts with waterchemical 2.Is redphysical 3.Conducts electricityphysical 4.Resists corrosionchemical 5.Boils at 88 o Cphysical 6.Is 1.5 m longphysical

10. Solute, Solvent & Precipitate Salt water: What is the solute? What is the solvent? What is a precipitate?

11. Solute, Solvent & Precipitate Salt water: What is the solute? What is the solvent? Salt = solute Water = solvent What is a precipitate? A solid produced during a chemical reaction

12. Naming – Writing Formulas Write the formulas for the following: 1. Lithium fluoride 2. Calcium oxide 3. Barium hydroxide 4. Sodium sulfate 5. Potassium perchlorate 6. Magnesium sulfite 7. Calcium hypophosphite 8. Hydrochloric acid 9. Nitric acid 10. Manganese (III) chloride

13. Naming – Writing Formulas Write the formulas for the following: 1. Lithium fluoride LiF 2. Calcium oxideCaO 3. Barium hydroxideBa(OH) 2 4. Sodium sulfateNa 2 SO 4 5. Potassium perchlorateKClO 4 6. Magnesium sulfiteMgSO 3 7. Calcium hypophosphiteCa 3 (PO 2 ) 2 8. Hydrochloric acidHCl (aq) 9. Nitric acidHNO 3 (aq) 10. Manganese (III) chlorideMnCl 3

14. Naming – Writing Names Name the following compounds: 1. Fe 2 (SO 4 ) 3 2. KNO 2 3. KClO 3 4. CuCl 5. PbI 2 6. NiBr 2 7. Hg(IO 3 ) 2 8. NO 2 9. H 3 PO 4 (aq) 10. H 2 SO 4 (aq)

15. Naming – Writing Names Name the following compounds: 1. Fe 2 (SO 4 ) 3 Iron (III) Sulfate 2. KNO 2 Potassium Nitrite 3. KClO 3 Potassium chlorate 4. CuClCopper (I) chloride 5. PbI 2 Lead (II) iodide 6. NiBr 2 Nickel (II) bromide 7. Hg(IO 3 ) 2 Mercury (II) iodate 8. NO 2 Nitrogen dioxide 9. H 3 PO 4 (aq)Phosphoric acid 10. H 2 SO 4 (aq)Sulfuric acid

16. Balancing Equations Balance the following: 1. Mg + O 2  MgO 2. Al + Pb(NO 3 ) 2  Al(NO 3 ) 3 + Pb 3. Chlorine + magnesium iodide  magnesium chloride + iodine 4. Zinc + sulfuric acid  zinc sulfate + hydrogen

17. Balancing Equations Balance the following: Mg + O 2  MgO 2Mg + O 2  2MgO Al + Pb(NO 3 ) 2  Al(NO 3 ) 3 + Pb 2Al + 3Pb(NO 3 ) 2  2Al(NO 3 ) 3 +3 Pb Chlorine + magnesium iodide  magnesium chloride + iodine Cl 2 + MgI 2  MgCl 2 + I 2 Zinc + sulfuric acid  zinc sulfate + hydrogen Zn + H 2 SO 4  ZnSO 4 + H 2

18. Calculate the Formula Mass Calculate the formula mass or molecular mass: 1. H 2 SO 4 2. Fe(CH 3 COO) 3 Calculate the mass in grams **The only difference between calculating formula mass and mass in grams is the units. The procedure is the same.

19. Calculate the Formula Mass Calculate the formula mass or molecular mass: 1. H 2 SO 4 (2 x 1.01) + 32.1 + (4 x 16) = 98.12 g 1. Fe(CH 3 COO) 3 55.8 + (6 x 12.0) + (9 x 1.01) + (6 x 16.0) = 232.89 Calculate the mass in grams **The only difference between calculating formula mass and mass in grams is the units. The procedure is the same.

20. Percent Composition calculate the percentage of nitrogen in ammonium nitrate, NH 4 NO 3, an important source of nitrogen in fertilizers. Calculate the percent compositions of the following: Fe 2 O 3 Ag 2 O

21. Percent Composition Answer calculate the percentage of nitrogen in ammonium nitrate, NH 4 NO 3, an important source of nitrogen in fertilizers.

22. Percent Composition Answer Fe 2 O 3

23. Empirical & Molecular Formula Determine the empirical formula for sodium sulfite. Sodium sulfite contains 36.5% sodium, 25.4% sulfur, and 38.1% oxygen. An organic compound is found to contain 92.25% carbon and 7.75 % hydrogen. If the molecular mass is 78.0 grams, what is the molecular formula? (not on test) A hydrated compound has an analysis of 18.29 % Ca, 32.37% Cl, and 49.34% H 2 O. What is its formula?

24. Empirical & Molecular Formula Determine the empirical formula for sodium sulfite. Sodium sulfite contains 36.5% sodium, 25.4% sulfur, and 38.1% oxygen.

25. Empirical & Molecular Formula A hydrated compound has an analysis of 18.29 % Ca, 32.37% Cl, and 49.34% H 2 O. What is its formula?

26. Electron Configuration Write the electron configurations of the following elements: 1. Sulfur 2. Calcium 3. Bromine Use the noble-gas notation, write the electron configuration of the following: 1. Fluorine 2. Cobalt 3. Phosphorus

27. Electron Configuration Write the electron configurations of the following elements: 1. Sulfur 2. Calcium 3. Bromine

28. Electron Configuration Use the noble-gas notation, write the electron configuration of the following: 1. Fluorine 2. Cobalt 3. Phosphorus

29. Electron Dot Structures How do you know how many valance electrons elements have? Write the electron dot structures for the following elements: 1. Nitrogen 2. Aluminum 3. Neon 4. Lead

30. Electron Dot Structures How do you know how many valance electrons elements have? Look for the highest energy level, then total up the number of electrons in the s & p sublevels.

31. Electron Dot Structures Write the electron dot structures for the following elements: 1. Nitrogen 2. Aluminum 3. Neon 4. Lead

32. Development of the Modern Periodic Table Which Scientist characterized the “Law of Octaves”? Which Region contains the : Halogens Alkaline Earths Noble GassesAlkali Metals

33. Development of the Modern Periodic Table Which Scientist characterized the “Law of Octaves”? Which Region contains the : Halogens - C Alkaline Earths - B Noble Gasses - DAlkali Metals - A

34. Development of the Modern Periodic Table Which region is referred to as the p-block d-block s-block f-block

35. Development of the Modern Periodic Table Which region is referred to as the p-block D d-blockC s-blockA f-blockB

36. Classification of the Elements Which element has an electron configuration that ends in the 5 th energy level? Which element is most metallic?

37. Classification of the Elements Which element has an electron configuration that ends in the 5 th energy level? C Which element is most metallic? A

38. Classification of the Elements What is the most important characteristic in determining an element’s chemical properties?

39. Classification of the Elements What is the most important characteristic in determining an element’s chemical properties? The number of valence electrons

40. Periodic Trends Which diagram correctly depicts the trend in Electronegativity First ionization energy Atomic Radius Ionic Radius

41. Periodic Trends Which diagram correctly depicts the trend in ElectronegativityB First ionization energyB Atomic RadiusC Ionic RadiusC

42. Periodic Trends In each pair which one is larger? Na, Rb Br, Br- S, Mg K, K+

43. Periodic Trends In each pair which one is larger? Na, RbRb Br, Br - Br - S, MgMg K, K+K