Download CHEM 1301 FALL 2003 TEST 2 VERSION 1

CHEM 1301
FALL 2003
TEST 2 VERSION 1
DON’T FORGET TO BUBBLE “1” UNDER “P”
1.
What is the electron configuration of the metalloid antimony (Sb)?
(A)
(D)
[Xe]5s24d105p3
[Xe]5s22d105p3
2.
An atom has the valence electron configuration, ns2np5. What group is it in?
(A)
noble gas
3.
When forming cations, electrons are removed first from orbits that are bigger rather than necessarily those with higher energy.
Given this, what is the electron configuration of the titanium(II)cation, Ti2+?
(A)
[Ar]4s23d2
4.
Which ions should be formed by calcium, selenium, and aluminium, respectively?
(A)
Ca2+, Se6+, Al3+
5.
Which element, isotope, or ion listed below contains 21 protons, 20 neutrons, and 18 electrons?
(A)
41
6.
Consider the anion from an atom of 80Br. How many protons, electrons and neutrons does it contain?
(A)
35, 35, 45
Sc3-
(B)
(E)
(B)
(B)
(B)
(B)
(B)
alkali metal
[Ar]4s23d4
Ca2+, S2-, Al3+
41
Ca2+
35, 36, 80
[Kr]5s22d104p3
5p3
(C)
(C)
(C)
(C)
(C)
(C)
alkaline earth metal
[Ar]4s2
C4-, Se2-, Al3-
41
Sc3+
35, 35, 80
1
[Kr]5s24d105p3
(D)
chalcogen
(E)
halogen
(D)
[Ar]4s13d1
(E)
[Ar]3d2
(D)
Ca2+, Se2-, Al3+
(E)
Ca+, Se-, Al+
(E)
41
(E)
36, 36, 44
(D)
(D)
39
Sc3+
35, 36, 45
Ar
7.
Which pair of particles has the same number of electrons?
(A)
F-, Mg2+
8.
How many dots will be drawn in the correct Lewis structure of ICl2-?
(A)
20
9.
Which of the following species contains the most lone pairs in its correct Lewis structure?
(A)
CCl4
10.
Which of the following species has a Lewis structure that can be drawn so that it obeys the octet rule (i. e, all atoms are "happy")?
(A)
KrF2
11.
According to what we have discussed in this class, which of the following substances could exist?
(A)
HeF2
12.
Bearing in mind the relationship between sulfate and sulfite, what is the formula of phosphite?
(A)
PO43-
13.
Which of the following compounds contains both ionic and covalent bonds?
(A)
HCl
14.
What is the name given to the compound whose formula is As3Cl6?
(A)
(D)
arsenic chlorine
triarsenic hexachloride
(B)
(B)
(B)
(B)
(B)
(B)
(B)
Br-, Se
(C)
21
(C)
CS2
(C)
BF3
(C)
NF5
(C)
HPO43-
(C)
NaCl
(C)
(B)
(E)
Ne, Ar
22
PF3
NO2
BH4-
PO42-
H2O
arsenic chloride
triarsenic hexachlorine
2
(D)
Al3+, P3-
(E)
Na, Na+
(D)
23
(E)
88
(E)
O2
(D)
(D)
(D)
SeCl2
BH3
H3
(E)
IF3
(E)
none of them
(D)
PO33-
(E)
PO32-
(D)
NaOH
(E)
CO2
(C)
arsenic hexachloride
15.
What is the chemical formula of calcium phosphate?
(A)
CaP
16.
Within the context of this course, which of the following statements is false?
(A)
(C)
(E)
Hydrogen will never make more than one bond
Compounds are known that contain noble gas atoms
Phosphorus can form more than four bonds
17.
Which of the following does not have a charge of –1?
(A)
chloride
18.
Which of the following species is correctly matched with its shape?
(A)
(D)
ammonium / trigonal pyramidal
carbonate / trigonal planar
19.
Which is the most electronegative atom in each of the following pairs?
I.
O or S
(A)
(B)
(C)
(D)
(E)
I.
I.
I.
I.
I.
20.
In reality, one finds that lone pairs are more repulsive than bonding groups. With this in mind, what would be the observed angle in
ammonia [NH3]?
(A)
109.5°
(B)
S
S
O
O
O
(B)
Ca3P2
hydroxide
II.
B or H
II.
II.
II.
II.
II.
B
H
B
H
B
(B)
(C)
120°
(B)
(E)
CaPO4
(B)
(D)
(C)
(D)
III.
III.
III.
III.
III.
(E)
Ca2(PO4)3
Carbon will never make more than four bonds
Oxygen will never make more than two bonds
bicarbonate
(D)
boron trihydride / trigonal pyramidal
water / linear
III.
Ca3(PO4)2
nitrate
(C)
(E)
ammonium
carbon dioxide / bent
O or Cl
O
Cl
Cl
O
O
(C)
<109.5°
3
(D)
>109.5°
(E)
>120°