a. cesium, barium, bromine, erbium, samarium
*b. francium, beryllium, iodine, terbium, berkelium
c. lithium, manganese, fluorine, lanthanum, vanadium
d. potassium, radium, iodine, lutetium, platinum
Answer: b
Learning objective 1.4 - explain the basis of the periodic table of the elements.
56. Which set below includes TWO and only two actinide elements?
a. gallium, germanium, iron, barium, tellurium
b. lithium, sodium, potassium, rubidium, francium
c. magnesium, gallium, fluorine, mercury, neptunium
*d. uranium, francium, gallium, plutonium, titanium
Answer: d
Learning objective 1.4 - explain the basis of the periodic table of the elements.
57. Which set below includes only alkali metal elements?
a. gallium, germanium, iron, barium, tellurium
*b. lithium, sodium, potassium, rubidium, francium
c. magnesium, gallium, flluorine, mercury, neptunium
d. radium, polonium, actinium, platinum, selenium
Answer: b
Learning objective 1.4 - explain the basis of the periodic table of the elements.
58. Which set below does not include at least one transition metal element?
a. gallium, germanium, iron, barium, tellurium
b. lithium, sodium, potassium, rubidium, francium
*c. magnesium, gallium, boron, argon, iodine
d. palladium, mercury, gold, aluminum, tin
Answer: c
Learning objective 1.4 - explain the basis of the periodic table of the elements.
59. Which of the sets below includes the largest number of elements?
a. alkali metals
b. alkaline earth elements
c. halogens
*d. lanthanides
Answer: d
Learning objective 1.4 - explain the basis of the periodic table of the elements.
60. The present form of the periodic table evolved from the pioneering work, in this area, of:
a. John Dalton.
b. J.J. Thomson.
c. Isaac Newton.
*d. Dmitri Mendeleev.
Answer: d
Learning objective 1.4 - explain the basis of the periodic table of the elements.
61. A naturally occurring element consists of three isotopes:
isotope 1 46.972 u 69.472%
isotope 2 48.961 u 21.667%
isotope 3 49.954 u 8.861%
What is the average atomic mass of this naturally occurring element?
*a. 47.667 u
b. 47.699 u
c. 48.629 u
d. 48.961 u
Answer: a
Learning objective 1.3 - describe the structure of the atom.
62. A naturally occurring element consists of three isotopes:
isotope 1 146.9672 u 64.792%
isotope 2 148.9638 u 26.117%
isotope 3 149.9592 u 9.0910%
What is the average atomic mass of this naturally occurring element?
a. 149.25 u
b. 147.80 u
c. 148.63 u
*d. 147.76 u
Answer: d
Learning objective 1.3 - describe the structure of the atom.
63. A naturally occurring element consists of three isotopes:
isotope 1 187.9122 u 10.861%
isotope 2 190.9047 u 12.428%
isotope 3 192.8938 u 76.711%
What is the average atomic mass of this naturally occurring element?
a. 190.57 u
b. 190.67 u
c. 192.08 u
*d. 192.11 u
Answer: d
Learning objective 1.3 - describe the structure of the atom.
64. A naturally occurring element consists of three isotopes:
isotope 1 147.9554 u 10.563%
isotope 2 150.9496 u 70.811%
isotope 3 152.9461 u 18.626%
What is the average atomic mass of this naturally occurring element?