Name Chapter Two Test Chemistry 1. If an atom contains 11 protons and 12 neutrons, its atomic number is A. 1 C. 12 B. 11 D. 23 2. The nucleus is made up of all of the following: A. Electrons C. Protons B. Neutrons D. Protons, neutrons, and electrons 3. A covalent bond is formed as the result of A. Transferring electrons C. Transferring protons B. Sharing an electron pair D. Sharing a proton pair 4. Ice floats on water because A. Of cohesion C. Water shrinks when it freezes B. Ice has a lower density then water D. Water expands when it freezes 5. The most abundant compound in most living things is A. Water C. Sodium chloride B. Carbon dioxide D. Sugar 6. Which of the following is a use of radioactive isotopes? A. Can determine the ages of rocks and fossils B. Can be used to treat cancer and kill bacteria that cause food to spoil C. Can be used in water D. None of the above 7. When hydrogen and oxygen combine to form water, water is A. A product C. Both a product and a reactant B. A reactant D. Neither a product nor a reactant 8. Identify the reactant(s) in the chemical reaction CO2 + H2O H2CO3 A. CO2, H2O, and H2CO3 C. H2CO3 B. H2O D. CO2 9. Enzymes affect the reactions in living cells by changing the A. Products of the reaction C. Temperature of the reaction B. Speed of the reaction D. ph of the reaction 10. The curved meniscus of the water in a graduated cylinder is due to A. Capillary action C. Adhesion B. Density D. Cohesion
11. When a solution is basic, the ph is A. Less than 3 C. Greater than 7 B. Less than 7 D. 7 12. An organic compound always contains A. Carbon C. Oxygen B. Helium D. Nitrogen 13. When atoms combine to form a compound, their outer energy levels lose or gain A. Electrons C. Protons B. Neutrons D. Ions 14. Which of the following are examples of chemical properties? A. Freezing C. Digesting B. Changing clothes D. Rotting 15. Which of the following are compounds? A. Gold C. Carbon dioxide B. Water D. Oxygen gas 16. Fats, oils, waxes, and steroids are all A. Lipids C. Protein B. Carbohydrates D. Human energy source 17. Polysaccharides are giant polymers consisting of thousands of linked A. Monosaccharides C. Fat molecules B. Nucleic acids D. Proteins 18. The process when a water is lost when two molecules are bonded is called: A. An inorganic compound C. Polymerization B. Hydrolysis D. Dehydration synthesis 19. The smallest particle of an element is a(n) A. Compound C. Molecule B. Atom D. Nucleus 20. Which of the following are examples of solutions? A. Salt water C. Water B. B. Salt D. Sugar water 21. When 2 glucose molecules are joined by dehydration synthesis, how many water molecules are formed? A. 1 C. 3 B. 2 D. 4
22. Sugar is dissolved in water. What is the solvent? A. Sugar C. Neither B. Water 23. Which of the following is a mixture? A. CaCO C. Potting soil B. Mg D. Oxygen 24. Which of the following particles make up an atom? A. Isotopes C. Neutrons B. Electrons D. Positives 25. Chemical reactions that release energy are A. Endothermic C. Products B. Enzymes D. Exothermic 26. Which of the following are physical changes? A. Ice melting C. Rusting B. Rotting D. Tearing 27. Electrons that are available to form bonds are A. Valence electrons C. Covalent B. Ionic D. Isotope 28. An uneven sharing of electrons between the oxygen and hydrogen atoms of water A. Hydrogen bonds C. Chemical Change B. Polarity D. Covalent bond 29. In the formula 2H2O, how many total atoms of hydrogen are there? A. Two C. Four B. 0 D. One 30 When there are an equal number of hydrogen atoms (H) and hydroxide atoms (OH) in a solution, the solution will be A. Acidic C. Neutral B. Basic D. Negative 31. Which of the following are macromolecules? A. Elements C. Proteins B. Nitrogen D. Lipids
32. The figure above shows amino acids linked together. What forms when amino acids are linked together? A. Lipids C. Protein B. Carbohydrate D. Nucleic Acid Match the following phrase to the correct answer. Answers can be used more than once. 33. Not soluble in water 34. Glucose 35. Genetic material, DNA and RNA 36. Has an amino group, carboxyl group, and R group 37. Main source of energy 38. Consists of a sugar, phosphate, and nitrogen base A. Carbohydrates B. Lipids C. Monosaccharide D. Nucleic Acids E. Cellulose F. Proteins G. Nucleotide 39. Monosaccharides, disaccharides, polysaccharides 40. Composed of C, H, N, O atoms 41. Tough fibers that give plants much of their strength and rigidity 42. Stores energy, waterproof coverings
Use the table below to answer questions 43 47 Substance ph Toothpaste 9.9 Vinegar 2 Blood 7.4 Eggs 8 Liquid drain cleaner 14 43. What is the strongest base listed in the table? 44. What is the ph of the strongest base listed in the table? 45. According to the table, is blood a base or an acid? 46. True or False. Vinegar has more H ions than it has OH ions. 47. A change in one unit on the ph scale represents a tenfold increase in the concentration of hydrogen ions. According to the ph values listed in the table, how much greater is the hydrogen ion concentration in vinegar than in eggs? 48. Fill in the missing data in the chart below. Element Symbol Protons Neutrons Electrons Atomic Number Mass Number Helium He 2 2 Oxygen O 8 Neon Ne 10 20 Potassium K 19 19 Aluminum Al 14 49. Correctly put the electrons of aluminum in the energy levels of the electron cloud. 50. Draw the correct structure of the water molecule.
Using the graph below answer the questions 51 and 52. 51. What is amylase in the figure above? A. Enzyme C. Lipid B. Protein D. Nucleic Acid 52. Using the graph above, how does amylase change the rate of the reaction? Please write the letter of the correct definition for each term below: 53. Activation Energy 54. Catalyst 55. Enzyme 56. Substrate 57. Suspension 58. Buffer A. Protein that acts as a biological catalyst. B. Reactant of an enzyme-catalyzed reaction. C. Substance that speeds up the rate of a chemical reaction. D. Weak acid or base that can react with strong acids or bases to help prevent sharp, sudden changes in ph. E. Energy needed to get a reaction started. F. Mixture of water and nondissolved materials.