CHEM 1301 FALL 2004
TEST 2 VERSION 1
NO CHEATING!
BUBBLE IN “1” IN THE P COLUMN TO GET YOUR GRADE POSTED!!!!! [the only way you’ll find out how you did!]
1.
How many valence electrons does an arsenic atom have?
(A)
33
2.
An atom has the valence electron configuration, ns2np5. What group is it in?
(A)
noble gas
3.
Which ions should be formed by magnesium, nitrogen, and chlorine, respectively?
(A)
Mg2+, N3-, Cl-
4.
Which element, isotope, or ion listed below contains 40 protons, 56 neutrons, and 36 electrons?
(A)
96
5.
Consider the ion formed by an atom of selenium-80. How many protons, electrons and neutrons does it contain?
(A)
34, 34, 46
6.
How many valence electrons should be drawn in the Lewis dot structure of the polyatomic anion GaCl4 ?
(A)
99
7.
What is the formula of aluminum sulfide?
(A)
AlS
Zr4+
(B)
(B)
(B)
(B)
(B)
15
alkali metal
Mn7+, N3-, C4+
96
Zr4-
34, 36, 46
(C)
(C)
(C)
(C)
(C)
8
alkaline earth metal
Mg2+, N5+, Cl-
84
Kr
34, 36, 80
(D)
5
(E)
3
(D)
chalcogen
(E)
halogen
Mg+, N5+, C4+
(E)
Mg+, N3-, Cl-
(E)
96
(D)
(D)
(D)
91
Zr4+
36, 36, 44
Kr
(E)
34, 34, 80
-
(B)
(B)
100
AlSO3
(C)
42
(D)
31
(E)
32
(C)
Al3S2
(D)
Al2(SO3)3
(E)
Al2S3
1
8.
Which of the following molecules can be correctly described by a Lewis structure that contains only single bonds?
(A)
C2F4
9.
Which molecule contains two unshared pairs of valence electrons?
(A)
H2Te
10.
Within the context of this course, which of the following statements is false?
(A)
(B)
(C)
(D)
(E)
Hydrogen will never make more than one bond
Carbon will never make more than four bonds
Compounds are known that contain noble gas atoms
Nitrogen will never make more than 3 bonds
Sulfur can form more than 4 bonds
11.
Which of the following molecules has an ideal Lewis structure (that is, all atoms happy)?
(A)
BH3
12.
What is the name given to the compound whose formula is S3F6?
(A)
(D)
sulfur fluorine
sulfur fluoride
13.
Which of the following has a charge of –1?
(A)
ammonium
14.
Which of the following compounds contains both ionic and covalent bonds?
(A)
HCl
(B)
(B)
(B)
C2F2
(C)
AsF3
(C)
NO2
(C)
(B)
(E)
(B)
(B)
carbonate
NaCl
CO2
SF4
BH4-
trisodium hexafluoride
trisulfur hexafluoride
(C)
(C)
phosphate
H2O
2
(D)
N2F2
(E)
N2F4
(D)
Cl2
(E)
SiSe2
(D)
XeF2
(E)
SiF6
(C)
trisulfur sexafluoride
(D)
sulfate
(E)
acetate
(D)
NaOH
(E)
CO2
15.
Bearing in mind the relationship between sulfate and sulfite or nitrate and nitrite, what is the formula of phosphite?
(A)
PO43-
16.
What is the formula of aluminum sulfite?
(A)
AlS
17.
Which one of the following will contain at least one angle of 90º?
(A)
BCl3
18.
Which of the following species would have a bent shape?
(A)
BCl3
19.
In reality, one finds that lone pairs are more repulsive than bonding groups. With this in mind, what would be the observed angle in
nitrite?
(A)
109.5°
20.
Which atom in each of the following pairs is more electronegative?
(A)
(D)
(B)
(B)
(B)
(B)
(B)
I.
O or S
I. O
I. S
II. N
II. C
II.
III. O
III. Cl
HPO43-
AlSO3
SF6
(C)
PO42-
(D)
PO33-
(E)
PO32-
(C)
Al2(SO4)3
(D)
Al2(SO3)3
(E)
Al2S3
SO2
(D)
CH4
(E)
CS2
SeO2
(D)
CO32-
(E)
PBr3
(C)
CO2
(C)
120°
(C)
C or N
(B)
(E)
<109.5°
III.
O or Cl
I. O
I. S
II. C
II. N
III. Cl
III. O
3
(D)
>120°
(C)
I. O
(E)
II. N
III. Cl
<120°