41. The discovery of the neutron is credited to:
*a. James Chadwick.
b. Hans Geiger.
c. Ernest Rutherford.
d. J.J Thomson.
Answer: a
Learning objective 1.3 - describe the structure of the atom.
42. The discovery of the atomic nucleus and the existence of the atomic nucleus and electrons as separate entities in the atom is credited to:
*a. Ernest Rutherford.
b. Hans Geiger.
c. James Chadwick.
d. J.J Thomson.
Answer: a
Learning objective 1.3 - describe the structure of the atom.
43. The symbol, Si, is used to represent the element:
a. silver.
*b. silicon.
c. sodium.
d. sulfur.
Answer: b
Learning objective 1.4 - explain the basis of the periodic table of the elements.
44. The symbol, Fe, is used to represent the element:
a. fermium.
b. fendium.
c. copper.
*d. iron.
Answer: d
Learning objective 1.4 - explain the basis of the periodic table of the elements.
45. The symbol, Ca, is used to represent the element:
a. cadmium.
*b. calcium.
c. californium.
d. carolinium.
Answer: b
Learning objective 1.4 - explain the basis of the periodic table of the elements.
46. Sodium and caesium are an example of two elements that belong to the same:
a. class.
b. gender.
*c. group.
d. period.
Answer: c
Learning objective 1.4 - explain the basis of the periodic table of the elements.
47. Silver and antimony are an example of two elements that belong to the same:
a. class.
b. gender.
c. group.
*d. period.
Answer: d
Learning objective 1.4 - explain the basis of the periodic table of the elements.
48. Which set of elements below are all in the same period?
*a. Na, Al, P, Ar
b. Fr, U, Am, Ca
c. K, Na, Li, Cs
d. Ba, Pb, As, Sn
Answer: a
Learning objective 1.4 - explain the basis of the periodic table of the elements.
49. Which one of the pairs below contains elements from the same period?
*a. Silver, tin
b. Silver, sulfur
c. Sodium, manganese
d. Copper, tin
Answer: a
Learning objective 1.4 - explain the basis of the periodic table of the elements.
50. Which one of the pairs below contains elements from the same period?
a. Iron, barium
b. Potassium, gold
c. Potassium, barium
*d. Potassium, iron
Answer: d
Learning objective 1.4 - explain the basis of the periodic table of the elements.
51. Which one of the pairs below contains elements from the same group?
a. Tin, zirconium
b. Potassium, sulfur
*c. Potassium, caesium
d. Potassium, nitrogen
Answer: c
Learning objective 1.4 - explain the basis of the periodic table of the elements.
52. Which one of the pairs below contains elements from the same group?
a. Manganese, barium
*b. Zinc, mercury
c. Copper, iron
d. Cerium, radium
Answer: b
Learning objective 1.4 - explain the basis of the periodic table of the elements.
53. Which set of elements below includes only known elements that are metals?
*a. uranium, americium, praseodymium, zinc
b. molybdenum, neptunium, xenon, barium, silicon
c. nitrogen, silicon, sulfur, arsenic
d. lead, bismuth, bromine, magnesium
Answer: a
Learning objective 1.4 - explain the basis of the periodic table of the elements.
54. Which set of elements below includes mostly nonmetals?
a. barium, calcium, strontium
b. lanthanum, lutetium, rhodium
*c. oxygen, selenium, tellurium
d. silicon, zinc, strontium
Answer: c
Learning objective 1.4 - explain the basis of the periodic table of the elements.
55. Which set below features one alkali, one alkaline earth, one halogen, one lanthanide and one actinide element?