Download III-1 C NC **III-2 C NC °IV-1 C NC °°IV-2 C NC ‡VIII-1

*III-1
°IV-1
‡VIII-1
C
C
C
NC
NC
NC
**III-2
°°IV-2
‡‡
XI-1
C
C
C
NC
NC
NC
CHEMISTRY 130
Quiz 2 Fall 2010 Form B
KEY
Name:
Chapter 3:
*A.
(1.2 points) Give the number of protons, neutrons and electrons for each atom
or ion listed below:
protons
neutrons
electrons
O
8
8
8
Mn
25
30
25
K1+
19
20
18
S2–
16
16
18
16
1.
8
55
2.
25
39
3.
19
32
4.
16
7 out of 12 responses correct for competency
**B.
(1.0 point) Fill in the blank with the symbol of the element or ion that best fits the
description.
1.
Na
is the alkali metal in the third period.
2.
Te
is the semimetal in Group 6A.
3.
H
Is the only nonmetal in Group IA.
4.
Br
is the halogen in the fourth period.
5.
F
Which of the elements is a halogen, Fr, Fe, Fm, or F?
3 out of 5 responses correct for competency
C.
(1.0 points) Inspect the list of words given below. Write the correct word to
complete the definition. There are more words than definitions.
Atomic Number
Mass Number
Isomers
Electrons
Molecules
Isotopes
Ions
Atomic Mass
Protons
Neutrons
1.
Protons
are positively charged subatomic particles.
2.
Atomic number
is the number of protons in a nucleus of an element.
3.
Neutrons
are neutral particles found in the nucleus of an atom.
4.
Ions
5.
Mass number
are atoms that bear an electrical charge.
gives the sum of protons and neutrons in a nucleus.
‡‡D. (1.2 points) Supply the correct particle for each reaction.
1.
131
I
2.
β
+
Xe
–1
54
218
4
214
→
α
+
Pb
84
2
82
90
0
90
Y
4.
→
53
Po
3.
131
0
→
β
+
Zr
39
–1
40
222
4
218
Rn
86
→
α
2
7 out of 12 responses correct for competency
+
Po
84
Chapter 4:
A.
(1 point) Give the expected formula and IUPAC name for the compound formed
between each pair of elements or ions. Use your Periodic Table as a guide.
Formula
Name
Sulfur
K2S
Potassium sulfide
2. Silver
3. Zinc
4. Hg2+
Bromine
Oxygen
Oxygen
AgBr
ZnO
HgO
Silver bromide
Zinc oxide
Mercury(II) oxide
5. Fe2+
Bromine
FeBr2
Iron(II) bromide
1. Potassium
‡B.
(0.5 pt) Give the IUPAC name of each compound whose formula is listed below.
1. CaF2
2.
3.
4.
5.
‡C.
MnS
NH3
K3PO4
PF3
Calcium fluoride
Manganese(II) sulfide
Ammonia
Potassium phosphate
Phosphorus trifluoride
(0.5 pt) Give the formula of each compound named below.
1. Magnesium sulfate
MgSO4
2. Carbon monoxide
3. Phosphoric acid
CO
H3PO4
4. Carbon disulfide
5. Xenon trioxide
3 out of five responses must be correct in both B and C for competency
CS2
XeO3
°D. (2 points) Calculate N, A, and S, then draw the Lewis Electron Dot structure for
each molecule or ion.
1. PCl3
Structure:
N=
(1P x 8) + (3Cl x 8) = 32
A=
(1P x 5) + (3Cl x 7) = 26
S=
6
2. NH41+
Structure:
N=
(1N x 8) + (4H x 2) = 16
A=
(1N x 5) + (4H x 1) =
S=
8
8
One response must be completely correct for competency.
°°E.
(2 Points) For each Lewis Electron Dot structure, supply the required information
1. CH3Cl
Electronic geometry about the central atom
Hybridization on the central atom
Molecular geometry
Is the molecule polar?
2. SO2
Electronic geometry about the central atom
Hybridization on the central atom
Molecular geometry
Is the molecule polar?
One response must be completely correct for competency.
tetrahedral
sp3
tetrahedral
yes
trigonal planar
sp2
angular/bent
yes