Sample Test 2
Atomic Structure and Subatomic
1. Which statement about electrons is false?
a. All atoms have electrons as part of their
b. Electrons have much less mass than any
c. Electrons are found in the nucleus of
the atom.
d. Electrons are negatively charged.
e. Electrons are attracted to positively
charged electrodes.
2. The electrical nature of matter can best be
demonstrated by an atom's
a. radioactivity
b. behavior on photographic paper
c. behavior in a cathode ray tube
d. atomic weight
e. atomic number
3. The Millikan oil drop experiment was used
to determine
a. the nuclear character of the atom
b. whether the atom was radioactive
c. the electron distribution in the atom
d. the atomic number of an atom
e. the charge of an electron
4. When an atom loses electrons, __________
are formed.
a. ions
b. protons
c. neutrons
d. nuclei
e. alpha particles
2.2 The Nuclear Atom
5. Which of the following statements concerning
the atom is false?
a. The atom contains protons, neutrons
and electrons.
b. Protons are found in orbits about the
c. Most of the mass of the atom is found
in the nucleus.
d. The nucleus contains both protons and
e. Chemical reactions involve only the
6. Rutherford's gold foil experiment used
alpha particles to reveal that:
a. isotopes exist
b. atoms have electrons
c. atoms have neutrons
d. atoms are radioactive
e. atoms have a nucleus
2.3 The Sizes of Atoms and the Units to
Represent Them
7. Which metric prefix means 1000?
a. kilo
b. nano
c. pico
d. micro
e. milli
8. Which metric prefix means 1 x 10-9?
a. kilo
b. nano
c. pico
d. micro
e. milli
9. There are __________ milligrams in a
a. 1 x10-3
b. 1 x 10-6
c. 1 x 103
d. 1 x 106
e. 1 x 109
10. There are __________ millimeters in a
a. 1 x 10-1
b. 1 x 10-2
c. 1 x 101
d. 1 x 102
e. 1 x 103
11. How many centimeters are in 21 feet?
a. 4.4 cm
b. 53 cm
c. 99 cm
d. 250 cm
e. 640 cm
12. How many millimeters are in 6.450 yards?
a. 589.8 mm
b. 491 mm
c. 914 mm
d. 1966 mm
e. 5898 mm
13. How many liters are in 15.5 gallons?
a. 16.4 L
b. 62.0 L
c. 65.7 L
d. 58.5 L
e. 14.6 L
14. Converting 75.8 pounds to kilograms
a. 29.8 kg
b. 34.5 kg
c. 167 kg
d. 193 kg
e. 758 kg
15. Converting 6.390 pounds to grams yields:
a. 2899 g
b. 6390 g
c. 14090 g
d. 2516 g
e. 16230 g
16. How many microliters (uL) are in 89.63 L?
a. 8.963 x10-4 uL
b. 8.963 x 10-7 uL
c. 8.963 x104 uL
d. 8.963 x 107 uL
e. 8.963 x 1010 uL
17. How many millimeters are in 3.00 feet?
a. 914 mm
b. 91.4 mm
c. 91400 mm
d. 762 mm
e. 76.2 mm
18. A box has dimensions of 1.51 in. by 2.74 in.
by 4.72 in. What is its volume in cubic
a. 1.19 cm3
b. 0.841 cm3
c. 7.69 cm3
d. 320. cm3
e. 49.6 cm3
19. A piece of paper measures 8.50 in. by 11.0
in. Calculate the area of the piece of
paper in square centimeters.
a. 237 cm2
b. 93.5 cm2
c. 603 cm2
d. 466 cm2
e. 14.5 cm2
20. Electromagnetic radiation having a
wavelength of 674 nm is in the red
region of the visible spectrum.
Converting this wavelength into
centimeters yields:
a. 2.65 x 10-7 cm
b. 6.74 x 10-5 cm
c. 265 cm
d. 6.74 x10-7 cm
e. 6.74 x 10-4 cm
2.4 Atomic Numbers and Mass
21. Which of the following is incorrect?
a. 63Cu has 29 protons, 29 electrons and
34 neutrons
b. 55Mn has 25 protons, 25 electrons and
30 neutrons
c. 37Cl has 20 protons, 20 electrons and
20 neutrons
d. 74Se has 34 protons, 34 electrons and
40 neutrons
e. 40Ar has 18 protons, 18 electrons and
22 neutrons
22. An element containing 32 protons, 32
electrons and 41 neutrons will have the
a. 73Ta
b. 41Ge
c. 41Nb
d. 73Nb
e. 73Ge
23. Which element has an atomic number of
35 and mass number of 80?
a. 35Br
b. 80Hg
c. 80Br
d. 35Hg
e. 35Cl
24. Which of the following statements is not true?
23 V has an atomic number of 23.
42 Mo contains 53 neutrons.
30 Zn has the same number of electrons and pr
26 Fe has the same number of neutrons and pr
6 C has the same number of protons, neutrons
25. Which of the following represent a pair of isotopes?
a. I and II
b. I and III
c. III and IV
d. I and IV
e. II and V
2.5 Isotopes and Atomic Weights
26. Which statement best describes isotopes?
a. atoms with the same number of protons
and different numbers of neutrons
b. atoms with the same number of
neutrons and a different number of
c. atoms with the same numbers of
protons and neutrons
d. atoms in the same horizontal period
e. atoms in the same vertical family
27. Which of the following statements about
two isotopes is false?
a. They will have the same atomic
b. They will have the same atomic
a. 2.57 moles
b. 0.389 moles
c. 1210 moles
d. 0.835 moles
e. 1.20 moles
34. How many grams of magnesium (Mg)
contain the same number of atoms as 10
28. Which of the following statements
g of neon (Ne)?
a. 6 g b. 8 g c. 10 g
concerning isotopes is true?
d. 12 g e. 24 g
a. Every element has 3 isotopes.
35. How many grams of carbon (C) contain
b. All isotopes of a given element are
the same number of atoms as 80 g of
c. Various isotopes of the same element
neon (Ne)?
a. 12 g
exhibit very different chemical reactivity.
b. 24 g
d. Various isotopes of the same element
c. 36 g
have the same mass.
d. 48 g
e. Various isotopes of the same element
e. 60 g
will have the same number of protons.
38Mass and Problem
29.Assume that only two isotopes of argon,
2.7 Molar
Ar exist
in nature.
36. How many 18
atoms are in18
a 10.0 g sample of
If this were true, the atomic weight of argon wouldmolybdenum
fall most closely
a. 1.10 x 10
a. 18-58 amu
b. 56-58 amu
b. 1.43 x 1023
c. 18-38.5 amu
c. 6.27 x 1022
d. 38-40 amu
d. 2.53 x 1026
30. An element that has 36 protons and 48
e. 5.78 x 1026
neutrons has an approximate atomic
37. How many atoms are in a 25.0 g sample of
weight of:
a. 12 amu
a. 1.67 x 1024
b. 36 amu
b. 3.76 x 1023
c. 48 amu
c. 2.52 x 1024
d. 60 amu
e. 84 amu
d. 6.02 x 1025
31. If the isotopic ratio of the two boron
e. 1.35 x 1026
isotopes B (10.013 amu) and B
38. Which sample contains the fewest number
(11.009 amu) has been altered from the
of atoms?
ratio found in nature and now contains
a. 10 g of F
b. 10 g of N
48.73% 10B, determine the atomic
c. 10 g of O
weight of the sample of boron.
d. 10 g of C
a. 10.811 amu
e. 10 g of Ne
b. 10.013 amu
39. Which sample contains the fewest
c. 11.009 amu
number of atoms?
d. 10.524 amu
a. 125 g Fe
e. 10.498 amu
b. 225 g C
2.6 Amounts of Substances and the
c. 50 g Xe
d. 25 g Ca
32. Calculate the number of grams in 0.125
e. 50 g Li
moles of nitrogen atoms.
sample contains the greatest
a. 0.0107 g
number of atoms?
b. 3.50 g
a. 50 g P
c. 112 g
b. 50 g Br
d. 1.75 g
c. 50 g Ca
e. 0.0046 g
d. 50 g Ti
33. Calculate the number of moles
e. 50 g Ba
represented by 21.7 g Fe.
c. They will have the same charge on the
d. They will have different numbers of
e. They will have essentially the same
chemical reactivity.
41. Which sample contains the greatest
number of atoms?
a. 512 g Mg
b. 619 g Pt
c. 435 g Ni
d. 642 g Rb
e. 216 g Cr
42. Which sample contains the same number
of atoms as 175.0 g of cadmium (Cd)?
a. 305 g Sn
b. 306 g Au
c. 225 g Pb
d. 175 g Hg
e. 142 g Ir
2.8 The Periodic Table
43. Which element can be classified as a
a. Sr
b. Sm
c. Sn
d. Se
e. Sb
44. Which element can be classified as a
a. Br
b. Xe
c. Ga
d. U
e. Ca
45. Which element can be classified as a noble
a. O
b. Na
c. Kr
d. Ti
e. P
46. Which element can be classified as a
transition metal?
a. N
b. Ne
c. Ce
d. Co
e. Sr
47. Which element can be classified as an
alkaline earth metal?
a. Ag
b. Au
c. Na
d. Al
e. Mg
48. Which element is highly reactive?
a. K
b. Cu
c. Kr
d. C
e. Al
49. Which element is the least reactive and is
found uncombined in nature?
a. Au
b. Ne
c. N
d. Cu
e. Fe
50. Three elements that are likely to have
similar chemical and physical
properties are:
a. Sr, Se, Sb
b. K, Ca, Sc
c. Sc, Ti, V
d. Ca, Sr, Ba
e. H, Fe, F
1. c
2. c
3. e
4. a
5. b
6. e
7. a
8. b
9. c
10. c
11. e
12. e
13. d
14. b
15. a
16. d
17. a
18. d
19. c
20. b
21. c
22. e
23. c
24. d
25. e
26. a
27. b
28. e
29. d
30. e
31. d
32. d
33. b
34. d
35. d
36. c
37. a
38. e
39. c
40. a
41. a
42. b
43. b
44. a
45. c
46. d
47. e
48. a
49. b
50. d