1. Chemistry CBA Review February 2010

2. 1. How many total atoms are in AgCl 3 Cu 2 ? 1.4 2.5 3.6 4.7 1.4 2.5 3.6 4.7

3. 2. How are elements organized on the periodic table? 1.Metals on left, Nonmetals on right 2.Nonmetals on left, Metals on right 3.Gases on left 4.Metalloids in groups 3-12 1.Metals on left, Nonmetals on right 2.Nonmetals on left, Metals on right 3.Gases on left 4.Metalloids in groups 3-12

4. 3. Covalent bonds involve… 1.Transfer of electrons 2.Really strong forces 3.Creation of ions 4.Sharing of electrons 1.Transfer of electrons 2.Really strong forces 3.Creation of ions 4.Sharing of electrons

5. 4. Which tool best measures the mass of a liquid? 1.Graduated cylinder 2.Scale 3.Metric ruler 4.Triple-beam balance 1.Graduated cylinder 2.Scale 3.Metric ruler 4.Triple-beam balance

6. 5. Which property of a baseball would be different on the moon? 1.Volume 2.Weight 3.Mass 4.Density 1.Volume 2.Weight 3.Mass 4.Density

7. 6. Which of the following describes only a physical change? 1.An iron tool turning red due to rust 2.A leaf in the fall turning yellow as photosynthesis stops 3.A snowball melting in someone’s hand 4.A piece of wood turning black in a fire 1.An iron tool turning red due to rust 2.A leaf in the fall turning yellow as photosynthesis stops 3.A snowball melting in someone’s hand 4.A piece of wood turning black in a fire

8. 7. Which of the following is not a mixture? 1.Water 2.Air 3.Lemonade 4.Pool water 1.Water 2.Air 3.Lemonade 4.Pool water

9. 8. Which of the following is NOT a property of a metal? 1.Solid at room temperature 2.Ductility 3.Malleability 4.Good insulator 1.Solid at room temperature 2.Ductility 3.Malleability 4.Good insulator

10. 9. If 100 grams of H 2 O decomposes into hydrogen and oxygen, which of the following must be true? 1.There will be 50 grams of hydrogen and 40 grams of oxygen 2.There will be 50 grams of hydrogen and 50 grams of oxygen 3.There will be 25 grams of hydrogen and 25 grams of oxygen 4.There will be 40 grams of hydrogen and 50 grams of oxygen 1.There will be 50 grams of hydrogen and 40 grams of oxygen 2.There will be 50 grams of hydrogen and 50 grams of oxygen 3.There will be 25 grams of hydrogen and 25 grams of oxygen 4.There will be 40 grams of hydrogen and 50 grams of oxygen

11. 10. An element’s mass number is the number of ___________ in its atoms. 1.Protons and electrons 2.Electrons and neutrons 3.Protons only 4.Protons and neutrons 1.Protons and electrons 2.Electrons and neutrons 3.Protons only 4.Protons and neutrons

12. 11. The part of an experiment that the scientist manipulates is the… 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group

13. 12. The part of an experiment that the scientist measures is… 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group

14. 13. The part of an experiment that the scientist uses for comparison is… 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group

15. 14. The part of an experiment that the scientist keeps consistent for all is… 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group 1.Independent Variable 2.Dependent Variable 3.Constant Variable 4.Control Group

16. 15. This is the term for what is formed when two or more atoms chemically combine. 1.Element 2.Compound 3.Molecule 4.Mixture 1.Element 2.Compound 3.Molecule 4.Mixture

17. 16. This is the term for what is formed when two or more elements chemically combine. 1.Element 2.Compound 3.Molecule 4.Mixture 1.Element 2.Compound 3.Molecule 4.Mixture

18. 17. What are the two most reactive families on the periodic table? 1.Halogens and Alkaline Earth Metals 2.Alkaline Earth Metals and Alkali Metals 3.Alkali Metals and Halogens 4.Halogens and Noble Gases 1.Halogens and Alkaline Earth Metals 2.Alkaline Earth Metals and Alkali Metals 3.Alkali Metals and Halogens 4.Halogens and Noble Gases

19. 18. When atoms combine in an ionic bond… 1.The resulting particles are positively charged 2.The resulting particles are negatively charged 3.The resulting particles are neutral in charge 4.The resulting particles share electrons 1.The resulting particles are positively charged 2.The resulting particles are negatively charged 3.The resulting particles are neutral in charge 4.The resulting particles share electrons

20. 19. This is the number of valence electrons of the elements in the carbon family. 1.4 2.5 3.6 4.7 1.4 2.5 3.6 4.7

21. 20. These are the reacants of photosynthesis. 1.Glucose and Water 2.Carbon Dioxide and Glucose 3.Water and Carbon Dioxide 4.Oxygen and Water 1.Glucose and Water 2.Carbon Dioxide and Glucose 3.Water and Carbon Dioxide 4.Oxygen and Water