front 1 If you have a toothache and the dentist taps your tooth to check for sensitivity, what part of the scientific method is being used? | back 1 a. experiment b. hypothesis c. theory d. law |
front 2 1 mg is larger than 1 dg. | back 2 True False |
front 3 At 20C, the density of ethyl alcohol is 0.789 g/mL, and that of water is 1.00 g/mL. Calculate the specific gravity of ethyl alcohol at 20 C. | back 3 a. 0.651 b. 0.789 c. 1.45 d. 6.51 |
front 4 Each of the numbers below is measured. Solve the calculation and give the correct number of significant figures. 3.52 x 10-16 – 8.16 x 10-17 | back 4 a. 2.704 x 10-15 b. 4.64 x 1016 c. 2.7 x 10-16 d. 27.04 x 1014 |
front 5 Which of the following numbers contains the designated CORRECT number of significant figures? | back 5 a. 30.1 C 2 significant figures b. 3.6 x 102m 3 significant figures c. 0.00450 m 3 significant figures d. 27.051 mL 4 significant figures |
front 6 Liquids have ___ shape and ___ volume. | back 6 a. fixed/variable b. fixed/fixed c. variable/fixed d. variable/variable |
front 7 Zenapax® is used as part of immunosuppressive therapy for transplant patients. The dosage is calculated on the basis of 1.0 mg/kg. What is the proper dose for a 175 lb patient? (Given: 1kg = 2.205 lbs.) | back 7 a. 79 mg b. 175 mg c. 385 mg d. 875 mg |
front 8 A hypothesis is a statement that proposes an explanation of a set of observations. | back 8 True False |
front 9 Which of the following is an example of a physical change? | back 9 a. a piece of paper cut into small pieces b. burning of paper c. butter becoming rancid d. baking a cookie |
front 10 Scientific laws differ from scientific theories in that | back 10 a. laws explain observations and theories describe observations. b. laws describe observations and theories explain observations. c. theories eventually become laws. d. No difference exists. Laws and theories have the same meaning. |
front 11 A mercury thermometer is used to take four temperatures of a solution. The temperatures are 44.8 ºC, 44.9 ºC, 45.0 ºC, and 45.1 ºC. An alcohol thermometer was also used and measured 44.9 ºC, 45.3 ºC, 45.4 ºC, and 45.9 ºC. The solution is correctly determined to be 45.0 ºC by other means. Which conclusion is correct? | back 11 a. The mercury thermometer is the more precise. b. The alcohol thermometer is the more precise. c. There is no difference between the thermometers. d. There is no way to determine precision with these temperatures. |
front 12 The correct conversion of 1 L is ___. | back 12 a. 1 m3 b. 1000 m3 . 0.001 m3 d. 100 m3 |
front 13 The temperature of a patient is found to be 38.5 C. What is this temperature in F? | back 13 a. 96F b. 101F c. 69F d. 107F |
front 14 Water flowing over a dam is an example of | back 14 a. potential energy. b. chemical energy. c. electrical energy. d. kinetic energy. |
front 15 Rusting of iron is a physical change | back 15 True False |
front 16 A patient’s temperature is taken three times by two nurses. The
results of three successive temperatures by each nurse are
| back 16 a. Nurse A’s results are more precise than those of nurse B. b. Nurse B’s results are more accurate than those of Nurse A .c. Both nurses have precise results. d. Nurse B’s results are both accurate and precise. |
front 17 The normal dosage for azinthromycin, an antibiotic, is 3.3 mg/kg. What is the proper dose for a 150 lb patient? (Given: 1kg = 2.205 lbs.) | back 17 a. 100 mg b. 224 mg c. 300 mg d. 495 mg |
front 18 A patient weighs 205.0 pounds, but the weight is to be recorded in kilograms. What is the patient’s weight in kilograms using whole numbers? (Given: 1 kg = 2.205 lbs.) | back 18 a. 451.4 kg b. 205.0 kg c. 100.4 kg d. 92.97 kg |
front 19 How much will the temperature change when 3.0 g of tooth enamel (specific heat = 0.18 cal/g C) absorbs 0.80 cal of heat energy? | back 19 a. 2.4C b. 3.7C c. 1.5C d. 8.6C |
front 20 The zeros in 0.00958 cm are not significant. | back 20 True False |
front 21 Sulfur has ___ electrons and ___ valence electrons. | back 21 a. 16, 6 b. 32, 4 c. 16, 0 d. 32, 6 |
front 22 Which statement is correct? | back 22 a. Cr is in period 6B. b. Fe is a transition metal. c. Mg is an alkali metal. d. Cl is an inert gas. |
front 23 An atom contains 12 protons and 12 neutrons, and a different atom contains 10 protons and 12 neutrons. These two atoms are not isotopes. | back 23 True False |
front 24 Atoms of elements belonging to the same group have an identical number of | back 24 a. total electrons .b. energy levels. c. inner electrons. d. valence electrons. |
front 25 What is the minimum protection against exposure to beta particles? | back 25 a. None, beta particles are of low energy and cannot penetrate skin. b. Gloves, a lab coat, or over a meter’s distance from the source. c. A thin sheet of plastic or metal. d. A sheet of lead. |
front 26 The quality factor (QF) for alpha particles is 20. What is the radiation dose in remsfor this patient if he absorbed 13 rads of alpha particles? | back 26 a) 20 rems |
front 27 Which form of ionizing radiation is most penetrating? | back 27 a. alpha b. beta c. gamma d. positron |
front 28 Glucose molecules produced during photosynthesis contain higher levels of carbon-12 than carbon -13 because | back 28 a. carbon -12 reacts slightly slower than carbon-13. b. carbon-12 has more electrons than carbon -13. c. carbon-12 reacts slightly faster than carbon-13. d. carbon-13 has more number of protons than carbon -12. |
front 29 A Nutrition Facts label on a food package indicates that one serving contains 2% of the recommended daily allowance (RDA) of iodine. If the serving size is one cup and the RDA for iodine is 0.15 mg per day, calculate the amount (in milligrams) supplied by one serving. | back 29 a. 0.0030 mg b. 15 mg c. 20 mg d. 0.15 mg |
front 30 The number of moles of calcium (Ca) represented by 7.39 g of calcium is | back 30 a. 40.0 moles of Ca. b. 18.6 moles of Ca. c. 0.184 mole of Ca. d. 296 moles of Ca. |
front 31 An atom of cobalt with a mass number of 60 has how many neutrons? | back 31 a. 27 b. 33 c. 59 d. 60 |
front 32 How many atoms of sodium are there in 0.200 moles sodium atoms? | back 32 a. 6.02 x 1024 atoms b. 6.02 x 1023 atoms c. 1.20 x 1023 atoms d. 1.20 x 1024 atoms |
front 33 Radioisotopes with short half-lives are used in diagnostic tests because | back 33 a. they have high energy. b. they are inexpensive. c. they do not pose health risks by being present long after use. d. they have less penetration ability. |
front 34 A patient who has undergone a PET scan that used fluorine-18 tagged glucose is likely to emit which of the following a few hours after the procedure? | back 34 a. x-rays b. alpha particles c. gamma radiation d. beta particles |
front 35 Mass number refers to | back 35 a. total number of protons and electrons. b. total number of protons. c. total number of neutrons and protons. d. total number of neutrons and electrons. |
front 36 The higher up within a group or family on the periodic table, | back 36 a. the heavier the nucleus. b. the more the element is likely to conduct electricity. c. the more nonmetallic in character. d. the more the element is likely to be a semimetal. |
front 37 Which statement is incorrect? | back 37 a. According to the atomic theory, all matter is composed of atoms. b. Protons, neutrons, and electrons are subatomic particles. c. Electrons have greater mass than protons. d. Neutrons are found in the nucleus of the atom. |
front 38 Calcium is a transition metal as is indicated by its location in the periodic table. | back 38 True False |
front 39 The dosage unit related to the amount of energy absorbed by an object exposed to nuclear radiation is ___. | back 39 a. curie b. rad c. rem d. Becquerel |
front 40 Whereas x-ray works well for bones, the value of a CT scan is that | back 40 a. it provides a 3 dimensional view of bones. b. it provides images of the inside of the body .c. it provides a clear picture of gamma rays produced within the tissue. d. it provides images used in studies, such as monitoring sugar usage. |
front 41 Which of the following is a physical change? | back 41 a. melting of ice b. burning oxygen in air c. rusting of iron d. baking cookies |
front 42 The instructions for a cough syrup are to give 2 teaspoons every 8 hours. The cough syrup is supplied in 150-mL bottles. How many bottles must be purchased to treat 3 children for 5 days? (Given 1 tsp = 5 mL.) | back 42 a. 1 bottle b. 2 bottles c. 3 bottles d. 4 bottles |
front 43 When a radioactive isotope emits a(n)___, its atomic number increases. | back 43 a. alpha particle b. beta particle c. gamma ray d. positron |
front 44 The dosage unit related to the amount of energy absorbed by an object exposed to nuclear radiation is ___. | back 44 a. curie b. rad c. rem d. Becquerel |
front 45 Subatomic particle with a positive charge is a(n) ___. | back 45 a. electron b. neutron c. proton d. cation |
front 46 How many atoms of sodium are there in 0.200 moles sodium atoms? | back 46 a. 6.02 x 1024 b. 6.02 x 1023 c. 1.20 x 1023 d. 1.20 x 1024atoms |
front 47 What is the weight of Amphotec¨, an antibiotic preparation for aspergillus infection, necessary for a 135 pound patient at the rate of 3.5 mg/kg per dose? (Given: 1kg = 2.205 lbs.) | back 47 a. 7.7 mg b. 61.4 mg c. 214 mg d. 2228 mg |
front 48 A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scientist is able to duplicate the results. The statement by Dr. Sigma is ___. | back 48 a. a law b. a hypothesis c. a theory d. not valid |
front 49 What is the number of 1-1/2 teaspoon doses of a liquid medication in a 250 mL bottle? (Given 1 tsp = 5 mL.) | back 49 a. 33 doses b. 125 doses c. 167 doses d. 250 doses |
front 50 Each of the numbers below is measured. Solve the calculation and give the correct number of significant figures._(2.34 x 104 ) x (1.38 x 107) | back 50 a. 3.2 x 1011 b. 3.23 x 1011 c. 3.229 x 1011 d. 3.23 x 1012 |
front 51 The zeros in 1700.85 cal are not significant. | back 51 True False |
front 52 Choose the incorrect statement about the proton: | back 52 a. The proton has the atomic mass of 1 amu. b. The proton has the same charge as the neutron. c. The proton has greater mass than an electron. d. The proton and the neutron have approximately the same atomic mass. |
front 53 An isotope of sodium contains 11 protons and 12 neutrons. | back 53 a. The atom also contains 11 electrons. b. The atom also contains 12 electrons. c. The atom also contains 23 electrons. d. There are no other factors related to the 11 protons and 12 neutrons. |
front 54 The higher the quality factor (QF) of a radiation, the less harmful the exposure to the radiation. | back 54 True False |
front 55 The maximum number of electrons that a particular energy level n can hold is ___. | back 55 a. n2 b. 2n c. 2n2 d. n-1 |
front 56 If one starts with 10.0 grams of a radioactive substance, how much will remain after 3 half lives? | back 56 a. 1.25 g b. 2.50 g c. 3.33 g d. 5.00 g |
front 57 At 20 C, chloroform (CHCl3) has a density of 1.489 g/mL. What is the mass of 7.52 mL of chloroform at 20 C? | back 57 a. 0.198 g b. 13.4 g c. 5.05 g d. 11.2 g |
front 58 The density of table salt is 2.16 g/mL. What is the volume in milliliters occupied by 356.0 g of table salt? | back 58 a. 165 mL b. 769 mL c. 0.00607 mL d. 358 mL |
front 59 While attempting to start your car, when you turn the key, there is no response. You suspect that the battery is dead. To determine this, you turn on the light switch. Your suspicion about the battery is an example of a ___, and your attempt to turn on the headlight is an example of a ___. | back 59 a. theory, law b. hypothesis, experiment c. experiment, hypothesis d. hypothesis, theory |
front 60 All matter is composed of tiny, indivisible particles called atoms. All atoms are composed of protons, neutrons, and electrons. These statements are an example of a scientific ___. | back 60 a. 5.8223 b. 5.822 c. 5.82 d. 5.8 |
front 61 Where are the metals located on the periodic table of the elements? | back 61 a. On the right side of the metalloid line (not including the metalloids). b. On the last group of the periodic table. c. On the left side of the metalloid line (not including the methalloids). d. In the two sections separated from the rest of the table. |
front 62 Which of the substances listed below is not an element? | back 62 a. sodium b. iron c. air d. carbon |
front 63 Mg has how many protons, neutrons, and electrons? | back 63 a. 12 protons, 23 neutrons, and 23 electrons b. 12 protons, 11 neutrons, and 11 electrons c. 23 protons, 11 neutrons, and 23 electrons . 12 protons, 11 neutrons, and 12 electrons |
front 64 Emission of a beta particle increases the number of protons in an atom's nucleus. | back 64 True False |
front 65 Which of the following is the correct order of elements in increasing atomic radius: K, Mg, B? | back 65 a. K<Mg<B b. B<Mg<K c. Mg<K<B d. B<K<Mg |
front 66 During melting of ice | back 66 a. the temperature remains constant even as more heat is added until all of the ice has melted . the temperature increases until all the ice has melted c. the temperature decreases until the ice has melted d. the energy that goes into converting ice to liquid water is called heat of vaporization |
front 67 Which of the following is a chemical property? | back 67 a. color b. flammability c. odo rd. hardness |
front 68 The density of gasoline is 0.73 g/mL at 20 C. Jenny's car requires 16 gallons of gasoline to fill her car's gas tank. How much mass (in pounds) of gasoline does she need to fill her tank? (Given: 1 qt= 0.946 L, 1 gallon = 4 qt, 1 Ib = 454 g, 1 mL= 1 x 10-3 L.) | back 68 a. 190 Ib b. 340 Ib c. 140 Ib d. 210 Ib |
front 69 A kitten's normal body temperature is 102¼F. Express this temperature in ¼C. | back 69 a. 5.7 ¼C b. 38.9 ¼C c. 56.7 ¼C d. 184 ¼C |
front 70 886.0 has four significant figures. | back 70 True False |
front 71 A 35 mg dose of iodine-131 with a half-life of 8 days is administered to a patient. How long will it take for the iodine to decay so that there are only about 2 mg remaining? | back 71 a. 8 days b. 16 days c. 32 days d. 64 days |
front 72 Two atoms that are isotopes of an element contain | back 72 a. the same number of electrons and neutrons. b. the same number of protons and neutrons. c. the same number of protons and a different number of neutrons. d. different numbers of protons. |
front 73 The unit commonly used to measure the amount of tissue damage that is produced by an exposure to ionizing radiation is ___. | back 73 a. rem b. rad c. curie d. Becquerel |
front 74 Boron, which occurs in nature as 10 5B (amu = 10.013) and 11 5B (amu = 11.009), has an atomic weight of 10.81. Which of the following statements is true? | back 74 a. isotope11 5B predominates b. isotope10 5B predominates c. both isotopes have equal percentages in nature d. the atomic weight of 10.013 amu is nearest the correct value for boron |
front 75 Which of the following is not a type of subatomic particle? | back 75 a. alpha particle b. electron c. neutron d. proton |
front 76 When 15.5 + 0.125 + 2.55 are added, assuming each of the numbers below is measured, the answer with the correct number of significant figures is ___. | back 76 a. 18.175 b. 18.2 c. 18.17 d. 18 |
front 77 Which is a unit of measure of mass? | back 77 a. liter b. ¼C c. kilogram d. Joule |
front 78 Iron has the atomic weight of 55.9. What is the number of atoms in one mole of iron? | back 78 a. 55.9 atoms b. 1 x 1024 atoms c. 6.02 x 1023 atoms d. 12 dozen atoms |
front 79 What is the number of atoms present in a 20.gram sample of lithium? | back 79 a. 1.38 x 102 b. 1.20 x 1025 c. 1.70 x 1024 d. 4.00x 1024 |
front 80 What is the relationship of a metal atom to the right of another metal atom in the same period? | back 80 a. The atom to the right is usually the smaller in diameter. b. The atom to the right is usually the smaller in atomic weight. c. The atom to the right is usually the smaller in atomic number. d. The atom to the right is more likely to have fewer isotopes. |
front 81 Whereas x-ray works well for bones, the value of MRI imaging is that | back 81 a. it provides a 3 dimensional view of bones. b. it provides images of the inside of the body. c. it provides a clear picture of gamma rays produced within the tissue. d. it provides images used in studies, such as monitoring sugar usage. |
front 82 At 20 C, chloroform (CHCl3) has a density of 1.489 g/mL. What is the mass of 7.52 mL of chloroform at 20 C? | back 82 a. 0.198 g b. 13.4 g c. 5.05 g d. 11.2 g |
front 83 An isotope of sodium contains 11 protons and 12 neutrons. | back 83 a. The atom also contains 11 electrons. b. The atom also contains 12 electrons .c. The atom also contains 23 electrons. d. There are no other factors related to the 11 protons and 12 neutrons. |