Exam
100 Points
Name:____________________
Date: _______________
(3 points, 1 pt each)True or False:
1) Electron affinity measures how easy an atom gains an electron.
Answer: TRUE
2) The atomic radius of iodine is one-half the distance separating the iodine nuclei.
Answer: TRUE
3) A group of ions all containing the same number of electrons constitutes an
isoelectronic series.
Answer: TRUE
(96 points, 4 pts each) Multiple Choice. Show all your work for partial credit
4) Of the following elements, which has the largest first ionization energy?
A) B
B) N
C) P
D) Si
E) C
Answer: B
5) In general, as you go across a period in the periodic table from left to right:
(1) the atomic radius __________;
(2) the electron affinity becomes __________ negative; and
(3) the first ionization energy __________.
A) decreases, decreasingly, increases
B) increases, increasingly, decreases
C) increases, increasingly, increases
D) decreases, increasingly, increases
E) decreases, increasingly, decreases
Answer: D
6) Element M reacts with chlorine to form a compound with the formula MCl2 . Element
M is more reactive than magnesium and has a smaller radius than barium. This element
is __________.
A) Sr
B) K
C) Na
D) Ra
E) Be
Answer: A
7) Most of the elements on the periodic table are __________.
A) gases
B) nonmetals
C) metalloids
D) liquids
E) metals
Answer: E
8) The only noble gas that does not have the ns2 np6 valence electron configuration is
__________.
A) radon
B) neon
C) helium
D) krypton
E) All noble gases have the ns2 np6 valence electron configuration.
Answer: C
9) Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si
and Ar?
A) Mg > Na > P > Si > Ar
B) Ar > Si > P > Na > Mg
C) Si > P > Ar > Na > Mg
D) Na > Mg > Si > P > Ar
E) Ar > P > Si > Mg > Na
Answer: D
10) Which one of the following atoms has the largest radius?
A) O
B) F
C) S
D) Cl
E) Ne
Answer: C
11) Which one of the following atoms has the largest radius?
A) I
B) Co
C) Ba
D) Sr
E) Ca
Answer: C
12) Which one of the following elements has the largest atomic radius?
A) Se
B) As
C) S
D) Sb
E) Te
Answer: D
13) Which one of the following elements has the largest atomic radius?
A) O
B) F
C) Al
D) P
E) B
Answer: C
14) Which of the following correctly lists the five atoms in order of increasing size
(smallest to largest)?
A) F < K < Ge < Br < Rb
B) F < Ge < Br < K < Rb
C) F < K < Br < Ge < Rb
D) F < Br < Ge < K < Rb
E) F < Br < Ge < Rb < K
Answer: D
15) Of the choices below, which gives the order for first ionization energies?
A) Cl > S > Al > Ar > Si
B) Ar > Cl > S > Si > Al
C) Al > Si > S > Cl > Ar
D) Cl > S > Al > Si > Ar
E) S > Si > Cl > Al > Ar
Answer: B
16) Of the following atoms, which has the largest first ionization energy?
A) Br
B) O
C) C
D) P
E) I
Answer: B
17) Of the following elements, which has the largest first ionization energy?
A) Na
B) Al
C) Se
D) Cl
E) Br
Answer: D
18) Of the following elements, which has the largest first ionization energy?
A) K
B) Rb
C) Sr
D) Ca
E) Ba
Answer: D
19) Which equation correctly represents the first ionization of aluminum?
A) Al- (g)  Al (g) + eB) Al (g)  Al- (g) + eC) Al (g) + e-  Al- (g)
D) Al (g)  Al+ (g) + eE) Al+ (g) + e-  Al (g)
Answer: D
20) Which ion below has the largest radius?
A) ClB) K+
C) Br D) FE) Na +
Answer: C
21) The ion with the smallest diameter is __________.
A) Br B) ClC) ID) FE) O 2Answer: D
22) Which of the following is an isoelectronic series?
A) B5- , Si 4- , As3- , Te2B) F- , Cl- , Br - , IC) S, Cl, Ar, K
D) Si 2- , P 2- , S2- , Cl2E) O2- , P- , Ne, Na +
Answer: E
23) Which isoelectronic series is correctly arranged in order of increasing radius?
A) K+ < Ca2+ < Ar < ClB) Cl- < Ar < K + < Ca 2+
C) Ca 2+ < Ar < K + < ClD) Ca 2+ < K + < Ar < ClE) Ca 2+ < K+ < Cl- < Ar
Answer: D
24) Of the following elements, __________ has the most negative electron affinity.
A) Na
B) Li
C) Be
D) N
E) F
Answer: E
25) Chlorine is much more apt to exist as an anion than is sodium. This is because
__________.
A) chlorine is bigger than sodium
B) chlorine has a greater ionization energy than sodium does
C) chlorine has a greater electron affinity than sodium does
D) chlorine is a gas and sodium is a solid
E) chlorine is more metallic than sodium
Answer: C
26) Of the elements below, __________ is the most metallic.
A) Na
B) Mg
C) Al
D) K
E) Ar
Answer: D
27) The list that correctly indicates the order of metallic character is __________.
A) B > N > C
B) F > Cl > S
C) Si > P > S
D) P > S > Se
E) Na > K > Rb
Answer: C
28) bonus point
Pe rio d ic Ta b le of t he Ele m e nt s
1A
1
8A
18
1
H
1 .0 1
2A
2
3A
13
4A
14
5A
15
6A
16
7A
17
2
He
4 .0 0
3
Li
6 .9 4
4
Be
9 .0 1
5
B
1 0 .8
6
C
1 2 .0
7
N
1 4 .0
8
O
1 6 .0
9
F
1 9 .0
11
Na
2 3 .0
12
Mg
2 4 .3
3B
3
4B
4
5B
5
6B
6
7B
7
8
9
10
1B
11
2B
12
14
Si
2 8 .1
15
P
3 1 .0
16
S
3 2 .1
17
Cl
3 5 .5
19
K
3 9 .1
20
Ca
4 0 .1
21
Sc
4 5 .0
22
Ti
4 7 .9
23
V
5 0 .9
24
Cr
5 2 .0
25
Mn
5 4 .9
26
Fe
5 5 .8
27
Co
5 8 .9
28
Ni
5 8 .7
29
Cu
6 3 .5
30
Zn
6 5 .4
13
Al
2 7 .0
31
Ga
6 9 .7
10
Ne
2 0 .2
18
Ar
3 9 .9
32
Ge
7 2 .6
33
As
7 4 .9
34
Se
7 9 .0
35
Br
7 9 .9
36
Kr
8 3 .8
37
Rb
8 5 .5
38
Sr
8 7 .6
39
Y
8 8 .9
40
Zr
9 1 .2
41
Nb
9 2 .9
42
Mo
9 5 .9
43
Tc
(9 8 )
44
Ru
101
45
Rh
103
46
Pd
106
47
Ag
108
48
Cd
112
49
In
115
50
Sn
119
51
Sb
122
52
Te
128
53
I
127
54
Xe
131
55
Cs
133
56
Ba
137
57
La
139
72
Hf
178
73
Ta
181
74
W
184
75
Re
186
76
Os
190
77
Ir
192
78
Pt
195
79
Au
197
80
Hg
201
81
Tl
204
82
Pb
207
83
Bi
209
87
Fr
(2 2 3 )
88
Ra
226
89
Ac
227
8B
85
86
84
At
Rn
Po
(2 0 9 ) (2 1 0 ) ( 2 2 2 )
104
105
106
107
108
109
Rf
Ha
Unh
Uns
Uno
Une
(2 6 1 ) ( 2 6 2 ) (2 6 3 ) (2 6 2 ) ( 2 6 5 ) (2 6 6 )
Lant ha nide s
58
Ce
140
59
Pr
141
Act inide s
90
Th
232
91
Pa
231
60
Nd
144
92
U
238
61
62
63
64
65
66
67
68
69
70
71
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
Lu
(1 4 5 ) 1 5 0
152
157
159
162
165
167
169 173
175
93
94
95
96
97
98
99
100
101
102
103
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
Lr
(2 3 7 ) (2 4 4 ) (2 4 3 ) ( 2 4 7 ) (2 4 7 ) (2 5 1 ) ( 2 5 2 ) (2 5 7 ) (2 5 8 ) (2 5 9 ) (2 6 0 )
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