Chemistry C101
Fall 2002 KA
Examination 1—Form A
Directions:
1.
Both your name and identification number must be included and balloons properly darkened on the
scan form. Any errors may result in a point penalty. Only the scan form will be graded.
2.
Choose the best answer in each of the following questions. Using a #2 pencil, fill in the corresponding
balloon on your scan form.
Potentially Useful Information
5
× (°F – 32°F)
9
q = mC∆T
°C =
1 mile ≡ 5280 ft
°C = K – 273
1 inch ≡ 2.54 cm
1 amu = 1.6606 × 10–24 g
1 mL ≡ 1 cm3
mass of proton: 1.6726 × 10–24 g
c = 3.000 × 108 m/sec
mass of electron: 9.1094 × 10–28 g
1 cal = 4.184 J
mass of neutron: 1.6749 × 10–24 g
The symbol “≡” means “identical to”, that is, with infinite precision (usually because it’s a definition).
s-block
d-block transition metals
p-block
DEPARTMENT OF CHEMISTRY • INDIANA UNIVERSITY -PURDUE UNIVERSITY INDIANAPOLIS
1
18
1A
8A
1
H
2
13
14
15
16
17
1.0079
2A
3A
4A
5A
6A
7A
3
4
5
6
7
8
9
Li
Be
B
C
N
O
F
6.941
9.0122
10.811
12.0107
14.0067
15.9994
18.9984
11
12
13
14
15
16
17
22.990
24.305
19
20
3
Na Mg
K
39.098
Ca
4
5
3B
4B
5B
6B
7B
21
22
23
24
25
Sc
40.078
44.956
38
39
85.468
87.62
88.906
55
56
57
37
Rb
Cs
Sr
Ba
Ti
47.867
La
V
Cr
50.9415
51.996
41
42
91.224
92.906
95.94
72
73
74
40
Y
6
Zr
Hf
Nb Mo
Ta
W
7
8
9
26
27
10
11
1B
2B
26.9815
28.0855
30.9738
32.066
35.4527
28
29
30
31
32
33
34
35
8B
Mn
Fe
54.938
55.845
43
44
Tc
Ru
Co
58.933
45
Rh
Ni
12
Cu
58.6934
Zn
63.546
46
65.39
47
Pd
48
Ag
Cd
79.904
52
53
Te
107.868
112.411
114.818
118.710
121.760
127.60
126.904
79
80
81
82
83
84
85
Re
Os
Ir
Pt
Au
Hg
180.948
183.84
186.207
190.23
192.217
195.078
196.967
200.59
105
106
107
108
109
110
111
112
[227.0]
[261.1]
[262.1]
[263.1]
[264]
[265.1]
[268]
[269]
[272]
[277]
Bh
Hs
Mt Uun Uuu Uub
Tl
204.383
Pb
207.2
Bi
208.980
Po
[208.98]
Lanthanide
series
Actinide
series
Ce
59
Pr
60
61
62
144.24
[144.9]
150.36
151.964
157.25
158.93
162.50
164.930
93
94
95
96
97
98
99
[243.1]
[247.1]
Nd Pm Sm
140.116
140.908
90
91
92
231.036
238.029
Th
232.038
Pa
U
Np
[237.0]
Pu
[244.1]
63
Eu
64
Gd
Am Cm
65
Tb
Bk
[247.1]
66
Dy
Cf
[251.1]
67
Ho
Es
[252.1]
At
[209.99]
4.0026
10
Ne
20.1797
18
Ar
39.948
36
Kr
83.80
54
Xe
131.29
86
Rn
[222.0]
Visit our website:http://www.chem.iupui.edu
f-block transition metals
58
I
78
104
Sg
51
Sb
78.96
106.42
178.49
Db
50
Sn
Br
77
89
Rf
49
In
74.9216
Se
102.906
138.906
Ac
72.61
Cl
76
88
Ra
69.723
As
S
101.07
137.327
[226.0]
Ge
P
75
87
Fr
Ga
Si
[98]
132.905
[223.0]
Al
2
He
68
69
70
167.26
168.934
173.04
174.967
100
101
102
103
[257.1]
[258.1]
[259.1]
[262]
Er
Tm Yb
Fm Md No
71
Lu
Lr
For admission information,
send e-mail to:
[email protected],
or call:
317.274.6872
© 1999, Department of Chemistry,
Indiana University –Purdue University
Indianapolis
Each question is worth 4 points. Choose the BEST answer.
1.
Carbon is a metal/nonmetal and has the symbol ________.
a.
b.
c.
d.
e.
2.
Which of the following is a physical change or property?
a.
b.
c.
d.
e.
3.
alkaline earth metals.
rare earth metals.
transition metals.
alkali metals.
halogens.
Which of the following elements is misspelled?
a.
b.
c.
d.
e.
6.
argon, strontium and zinc
aurum, silver and zirconium
arsenic, sulfur and xenon
argon, strontium and zirconium
arsenic, sulfur and zirconia
Barium and beryllium are examples of
a.
b.
c.
d.
e.
5.
digestion of protein
setting of concrete
water vapor condenses
natural gas burns
iron corrodes
The symbols Ar, Sr and Zr are:
a.
b.
c.
d.
e.
4.
metal, C
metal, Ca
nonmetal, C
nonmetal, Ca
nonmetal, Cl
potassium
fluorine
silicon
phosphorous
all are correctly spelled
Which formula has the largest number of metal atoms represented in its formula?
a.
Na 2 Cr 2 O 7
b.
Ag2 SO 4
c.
MgCO3
d.
C 6 H6
e.
KMnO4
7.
Which of the following has exactly two significant figures (digits)?
a.
b.
c.
d.
e.
8.
0.66
500
9020.
0.6600
2.10×101
Which digit is uncertain in the following mass? (Note: BOLD type specifies the digit.)
0.12321 g
a.
b.
c.
d.
e.
9.
10.
Which characteristics correctly describe a proton?
a.
mass approximately 1 amu, charge +1, located inside the nucleus
b.
mass approximately 1 amu, charge –1, located inside the nucleus
c
mass approximately 1 amu, charge +1, located outside the nucleus
d.
mass approximately
1
1836
amu, charge +1, located inside the nucleus
e.
mass approximately
1
1836
amu, charge –1, located outside the nucleus
An atom with mass number (A) 69 and atomic number (Z) 31 contains:
a.
b.
c.
d.
e.
11.
31
69
31
38
31
protons
protons
protons
protons
protons
and
and
and
and
and
69 neutrons
31 neutrons
38 neutrons
31 neutrons
100 neutrons
Which of the following types of electromagnetic radiation has the highest energy?
a.
b.
c.
d.
e.
12.
0.12321
0.12321
0.12321
0.12321
0.12321
red light
blue light
yellow light
infrared radiation
ultraviolet radiation
Express 23400 in scientific notation.
a.
2.34 × 103
b.
2.34 × 104
c.
2.34 × 105
d.
2.34 × 10–2
e.
2.34 × 10–4
13.
Evaluate the following expression to the correct number of significant figures:
2.34 × 10–2 mL + 1.002 × 10–2 mL + 0.02 mL
14.
a.
5. × 10–2 mL
b.
5.0 × 10–2 mL
c.
5.3 × 10–2 mL
d.
5.34 × 10–2 mL
e.
5.342 × 10–2 mL
What is the mass in grams of 135 atoms of bromine?
Note: 1 amu = 1.6606 × 10–24 grams
15.
16.
a.
1.5394 × 10–28 g
b.
9.8288 × 10–25 g
c.
2.8056 × 10–24 g
d.
7.8463 × 10–21 g
e.
1.7913 × 10–20 g
Which is the correct ground state electron configuration for aluminum ion, Al3+ ?
a.
1s2 2s2 2p2
b.
1s2 2s2 2p6
c.
1s2 2s2 2p2 3s2
d.
1s2 2s2 2p6 3s2 3p1
e.
1s2 2s2 2p2 3s2 3p2
Isoelectronic refers to species that
a.
b.
c.
d.
e.
17.
have the same charge.
have identical mass numbers, A.
have identical electron configurations.
reside in the same period in the periodic table.
have the same number of protons, but different numbers of neutrons.
The maximum number of electrons in any orbital is
a.
b.
c.
d.
e.
1
2
6
10
18
18.
19.
20.
21.
Which of the following represents a ground state electron configuration?
a.
1s ↑↓
2s ↑↓
2p ↑
b.
1s ↑↓
2s ↑↓
2p ↑↓ ↑↓ ↑
3s
c.
1s ↑↓
2s ↑
2p ↑
↑
↑
3s
d.
1s ↑
2s ↑
2p ↑
↑
↑
3s ↑
e.
1s ↑↓
2s ↑↓
2p ↑↓ ↑
↑
3s ↑
a.
3.5 × 10–3 mL
b.
c.
d.
e.
3.5 × 103 mL
3.5 × 106 mL
350000 mL
0.00350 mL
3s ↑
Benzyl salicylate, a sunscreen, melts at 75°F and boils at 608°F. At which temperature
would benzyl salicylate be a gas?
a.
0°F
b.
0°C
c.
100°C
d.
e.
300°C
none of the above
How many distinct d-orbitals exist? Remember, the d-block is ten elements wide.
3
5
6
10
18
The density of a solution is 1.293 g/mL. What is the mass of 3.0 mL of this solution (with
proper attention to correct significant digits)?
a.
b.
c.
d.
e.
23.
↑
Convert 3.5 liters to milliliters.
a.
b.
c.
d.
e.
22.
↑
0.43 g
4.0 g
3.9 g
3.879 g
2.3 g
A sulfur atom that has gained two electrons has the same number of electrons as a neutral
atom of:
a.
C
b.
Ne
c.
Mg
d.
Si
e.
Ar
24.
Suppose an equal amount of heat is absorbed by different masses of each of the following
metals and you discover that the temperature of the magnesium sample changes the most.
Which of the following could be a correct statement of the relative masses of the metal
samples studied?
Au: 0.031 cal/g⋅°C
a.
b.
c.
d.
e.
25.
26.
27.
Mg: 0.245 cal/g⋅°C
Au > mass Fe > mass Mg
Mg > mass Fe > mass Au
Mg > mass Au > mass Fe
Au > mass Mg > mass Fe
Fe > mass Mg > mass Au
Which of the following can be classified as a pure compound ?
a.
glucose, C 6 H12O 6
b.
mercury metal, Hg
c.
chlorine gas, Cl2
d.
rubbing alcohol, C 3 H8 O in H2 O
e.
all of the above
An extra-strength aspirin tablet contains 0.500 grams of aspirin. How many grains is this?
Note: 1 grain = 64.8 mg
a.
3.24 × 104 grains
b.
65.3 grains
c.
32.4 grains
d.
13.0 grains
e.
7.72 grains
How many millimeters are there in one kilometer?
a.
b.
c.
d.
e.
28.
mass
mass
mass
mass
mass
Fe: 0.106 cal/g⋅°C
10–6
10–3
10–2
103
106
What temperature is 75.0 °F on the Kelvin scale?
a.
b.
c.
d.
e.
24.0 K
43.0 K
215 K
297 K
348 K
29.
An atom that contains 47 protons, 47 electrons and 60 neutrons is an isotope of:
a.
b.
c.
d.
e.
Ag
Al
Nd
Bh
cannot be determined from the information given
30.
Which element is likely to have chemical properties similar to elemental potassium?
a.
Ar
b.
Ca
c.
Sc
d.
Rb
e.
Sr
31.
How many electrons can occupy the shell having n = 2?
a.
b.
c.
d.
e.
32.
The neutral element with electron configuration 1s2 2s2 2p4 is:
a.
b.
c.
d.
e.
33.
Be
C
O
Si
S
The neutral element that has exactly four valence electrons is:
a.
b.
c.
d.
e.
34.
2
6
8
18
32
H
Na
Mg
Si
S
In terms of atomic structure, the common characteristic of elements in the same group is:
a.
number of electrons
b.
number of valence electrons
c.
number of neutrons
d.
number of protons
e.
mass number
35.
36.
What temperature change results if 10.0 g of iron absorbs 50.0 calories?
Note: The specific heat of iron is 0.106 cal/g⋅°C.
a.
47.2 °C
b.
0.530 °C
c.
0.0212 °C
d.
1.89 °C
e.
53.0 °C
What is the density if 58.41 g of a metal occupies a volume of 9.0 cubic centimeters (cm3 )?
Make sure your answer has the correct number of significant figures.
a.
b.
c.
d.
e.
37.
6.49 g/mL
6.5 g/mL
7 g/mL
0.154 g/mL
0.15 g/mL
The densities of ethylene glycol, water and wood alcohol are 1.11 g/mL, 1.00 g/mL and 0.79
g/mL respectively. Suppose an object floats in water and ethylene glycol but sinks when
placed in wood alcohol. Which of the following could be the density of the object?
a.
b.
c.
d.
e.
1.22
1.11
1.05
0.92
0.75
38.
When
a.
b.
c.
d.
e.
an electrical current is used to make hydrogen gas and oxygen gas from water,
a simple change of state (physical change) has occurred.
a chemical change has occurred.
water is a reactant and hydrogen and oxygen are products.
a and c
b and c
39.
The atomic weight listed for an element in the periodic table is
a.
the same as the mass number (A) for the element.
b.
a weighted average of the weights of naturally-occurring isotopes of the element.
c.
the average of the mass number (A) and the atomic number (Z).
d.
the mass of an atom with the weight adjusted to reflect loss or gain of electrons.
e.
the weight of the predominant isotope found on earth.
40.
93
42
a.
b.
c.
d.
e.
g/mL
g/mL
g/mL
g/mL
g/mL
Mo is an isotope of molybdenum with _____ neutrons in its nucleus.
96
93
84
51
42