CHEM-100-chapter-2 Multiple Choice Identify the choice that best completes the statement or answers the question.

Size: px

Start display at page:

Download "CHEM-100-chapter-2 Multiple Choice Identify the choice that best completes the statement or answers the question."

Louisa Audrey Harmon
7 years ago
Views:

1 CHEM-100-chapter-2 Multiple Choice Identify the choice that best completes the statement or answers the question. 1.Which metric prefix means ? a. milli b. kilo c. pico d. micro e. nano 2.Which metric prefix means ? a. milli b. pico c. kilo d. micro e. nano 3.There are milligrams in a kilogram. a b c d e There are centimeters in a nanometer. a b c d e How many centimeters are in 15 feet? a. 570 cm b. 460 cm c. 38 cm d. 71 cm e. 3.1 cm 6.How many millimeters are in yards? a. 139 mm b mm c. 418 mm d mm e mm 7.How many liters are in 14.6 gallons? a L b L c L d L e L 8. Converting 127 pounds to kilograms yields: a kg. b. 280 kg. c. 326 kg. d kg. e kg. 9. Converting pounds to grams yields: a g. b g. c g. d g. e g. 10. How many microliters are in L? a L b L c L d L e L 11. If a cylindrical water tower has a tank with a radius of 4.5 m and a height of 6.5 m, what is the volume of the tank in liters? The volume of a cylinder is r 2 h. a L b L c L d L e L 12. A piece of paper measures 8.50 in. by 11.0 in. Calculate the area of the piece of paper in square centimeters. a. 603 cm 2 b. 237 cm 2 c cm 2 d cm 2 e. 466 cm 2 13.The volume of a carbon atom is nm 3. What is the volume of the atom in cubic centimeters? a cm 3 b cm 3

2 c cm 3 d. 10 cm 3 e. 10 cm 3 14.How many significant figures are present in each of the following: 86.9, 3.710, and ? a. three, four, three b. three, three, four c. three, four, four d. three, three, three e. three, four, five 15.What is the proper answer and number of significant figures for the following calculation: ? a b c d e. None of these choices 16.What is the proper answer and number of significant figures for the following calculation: ( ) 8.152? a b. 80 c d e Which of the following is correct? a. 59 Co has 27 protons, 27 electrons and 32 b. 34 S has 16 protons, 16 electrons and 16 c. 48 Ti has 22 protons, 22 electrons and 24 d. 81 Br has 35 protons, 35 electrons and 81 e. 40 Ar has 18 protons, 18 electrons and Which statement about electrons is true? a. Electrons are attracted to negatively charged electrodes. b. Electrons are found in the nucleus of the atom. c. Electrons have much more mass than any atom. d. All atoms have electrons as part of their structure. e. Electrons are positively charged. 19.The electrical nature of matter can best be demonstrated by an atom's a. radioactivity. b. atomic number. c. behavior on photographic paper. d. atomic weight. e. behavior in a cathode ray tube. 20.Which of the following types of radiation is/are deflected when passed between electrically charged plates? a. alpha b. alpha, beta, and gamma c. gamma d. beta e. alpha and beta 21.The Millikan oil drop experiment was used to determine a. the electron distribution in the atom. b. whether the atom was radioactive. c. the atomic number of an atom. d. the charge of an electron. e. the nuclear character of the atom. 22.When an atom loses electrons, are formed. a. ions b. neutrons c. protons d. alpha particles e. nuclei 23.Which of the following statements concerning the atom is false? a. The radius of an atom is approximately 10,000 times larger than the radius of the nucleus. b. The nucleus contains both protons and c. A neutral atom always has equal numbers of protons and d. Electrons are found in orbits about the nucleus. e. Most of the mass of the atom is found in the nucleus. 24.In Rutherford's gold foil experiment: a. the alpha particles mostly bounced off the foil, with most particles undergoing sharp deflections. b. the alpha particles used were attracted to the positive particles in the gold foil. c. Rutherford concluded that there must be a compact, massive, positively charged particle inside the gold atoms.

3 d. Rutherford's expectations for the experiment were proven to be correct. e. neutrons were discovered. 25.An element containing 26 protons, 26 electrons and 30 neutrons will have the symbol: a. 56 Zn. b. 82 Te. c. 52 Zn. d. 52 Te. e. 56 Fe. 26.Which element has an atomic number of 3 and mass number of 7? a. 7 Li b. 10 Ne c. 4 Li d. 7 Be e. 10 N 27.Which of the following statements is not true? a. C has the same number of protons, neutrons and electrons. b. Zn has the same number of electrons and protons. c. V has an atomic number of 23. d. Mo contains 53 e. Fe has the same number of neutrons and protons. 28.Which of the following represent a pair of isotopes? Cl Ar O F Ar I. II. III. IV. V. a. II and V b. I and III c. I and IV d. I and II e. III and IV 29.Which of the following is the most correct in regards to the mass spectrometer experiment? a. A mass spectrometer provides evidence of the existence of the electron. b. A mass spectrometer provides evidence of the existence of the proton. c. A mass spectrometer provides evidence for the existence of different isotopes. d. A mass spectrometer provides evidence that different atoms of the same element have different atomic numbers. e. Both c and d are correct. 30.Which statement best describes isotopes? a. atoms with the same number of protons and different numbers of neutrons b. atoms in the same vertical family c. atoms in the same horizontal period d. atoms with the same number of neutrons and a different number of protons e. atoms with the same numbers of protons and neutrons 31.Which of the following statements about two isotopes is true? a. They will have the same atomic mass. b. They will have different numbers of protons. c. They will have very different chemical reactivity. d. They will have the same number of e. They will have the same atomic numbers. 32.Which of the following statements concerning isotopes is true? a. All isotopes of a given element are radioactive. b. Various isotopes of the same element have the same number of protons. c. Every element has 3 isotopes. d. Various isotopes of the same element exhibit very different chemical reactivity. e. Various isotopes of the same element have the same mass. 33. Assume that only two isotopes of argon, S and S exist in nature. If this were true, the atomic weight of sulfur would fall most closely within which range? a amu b amu c amu d amu e amu 34. An element that has 32 protons and 52 neutrons has an approximate atomic weight of: a. 32 amu. b. 52 amu. c. 20 amu. d. 84 amu.

4 e. 60 amu. 35.A sample of gallium contains two isotopes and its atomic weight is amu. If the sample is composed of 60.10% 69 Ga ( amu), what is the identity and atomic weight of the other isotope? a. 71 Ga (70.25 amu) b. 70 Ga (70.25 amu) c. 70 Ga (70.51 amu) d. 70 Ga (70.92 amu) e. 71 Ga (70.92 amu) 36.An element has three naturally occurring isotopes with the following masses and abundances (in parenthesis): amu (0.9222); amu (0.0469); amu (0.0310). Calculate the atomic weight of the element. a amu b amu c amu d amu e amu 37.Calculate the number of grams in moles of nitrogen molecules (N 2 ). a g b g c g d g e g 38.Calculate the number of moles represented by 21.7 g Fe. a moles b moles c moles d moles e moles 39.How many grams of argon (Ar) contain the same number of atoms as 27 g of aluminum (Al)? a. 18 g b. 40 g c. 67 g d. 27 g e. 31 g 40.How many grams of platinum (Pt) contain the same number of atoms as 5.0 g of lithium (Li)? a g b. 98 g c g d g e. 5.0 g 41. How many atoms are in a 10.0 g sample of titanium (Ti)? a b c d e How many hydrogen atoms are in a 12.2 g sample of ammonia (NH 3 )? a b c d e Which sample contains the fewest atoms? a. 10 g of Ne b. 10 g of F c. 10 g of C d. 10 g of O e. 10 g of N 44. Which sample contains the fewest atoms? a. 225 g C b. 50 g Xe c. 25 g Ca d. 125 g Fe e. 50 g Li 45. Which sample contains the greatest number of atoms? a. 50 g Ca b. 50 g P c. 50 g Ti d. 50 g Br e. 50 g Ba 46. Which sample contains the fewest number of atoms? a. 435 g Ni b. 619 g Pt c. 512 g Mn d. 216 g Cr e. 642 g Rb

5 47. Which sample contains the same number of atoms as g of cadmium (Cd)? a. 305 g Sn b. 307 g Au c. 225 g Pb d. 175 g Hg e. 142 g Ir 48.Which element can be classified as a lanthanide? a. Tl b. Th c. Tb d. Tc e. Ti 54.Which element is the least reactive and is found uncombined in nature? a. Cu b. Ne c. N d. Fe e. Au 55. Three elements that are likely to have similar chemical and physical properties are: a. Pb, Bi, Po b. B, C, Si c. Cu, Ag, Au d. Ca, Co, Cr e. H, He, Ne 49.Which element can be classified as a halogen? a. He b. O c. Cl d. H e. La 50.Which element can be classified as a noble gas? a. Cl b. S c. Ne d. P e. No 51.Which element can be classified as a transition metal? a. N b. Rb c. F d. Ar e. Co 52.Which element can be classified as an alkali metal? a. Al b. Na c. U d. Sr e. Ag 53.Which element is highly reactive? a. Cu b. Kr c. Al d. K e. C

6 CHEM-100-chapter-2 Answer Section MULTIPLE CHOICE 1. ANS: D 2. ANS: E 3. ANS: B 4. ANS: D 5. ANS: B 6. ANS: C 7. ANS: A 8. ANS: E 9. ANS: D 10. ANS: A 11. ANS: B 12. ANS: A 13. ANS: C 14. ANS: A 15. ANS: B 16. ANS: E 17. ANS: A 18. ANS: D 19. ANS: E 20. ANS: E 21. ANS: D 22. ANS: A 23. ANS: C 24. ANS: C 25. ANS: E 26. ANS: A 27. ANS: E 28. ANS: A 29. ANS: C 30. ANS: A 31. ANS: E 32. ANS: B 33. ANS: E 34. ANS: D 35. ANS: E 36. ANS: A 37. ANS: B 38. ANS: C 39. ANS: B 40. ANS: D 41. ANS: E 42. ANS: A 43. ANS: A 44. ANS: B 45. ANS: B 46. ANS: B 47. ANS: B 48. ANS: C 49. ANS: C 50. ANS: C 51. ANS: E 52. ANS: B 53. ANS: D 54. ANS: B 55. ANS: C

B) atomic number C) both the solid and the liquid phase D) Au C) Sn, Si, C A) metal C) O, S, Se C) In D) tin D) methane D) bismuth B) Group 2 metal

B) atomic number C) both the solid and the liquid phase D) Au C) Sn, Si, C A) metal C) O, S, Se C) In D) tin D) methane D) bismuth B) Group 2 metal 1. The elements on the Periodic Table are arranged in order of increasing A) atomic mass B) atomic number C) molar mass D) oxidation number 2. Which list of elements consists of a metal, a metalloid, and