Chemistry Honors Review
Name_____________________________
Multiple Choice Portion: 20 questions at 4 points each. Circle the one best
answer to each question
1) How many valence electrons in an atom of sulfur?
(a) 1
(b) 2
(c) 3
(d) 4
(e) 6
2) Which of the following has two valence electrons?
(a) Ca2+
(b) K+
(c) O2-
(d) F-
(e) none of
these
3) Which of the following has the electron configuration of a noble gas?
(a) H-
(b) K+
(c) Sr2+
(d) P3-
(e) all of
these
4) What is the correct Lewis dot structure of an atom of silicon?
(a)
Si
(b)
Si
(c)
Si
(d)
Si
(e) none of these
5) The octet rule states that atoms form ions to:
(a)
(b)
(c)
(d)
(e)
obtain 8 electrons in the outer shell
obtain the electron configuration of a noble gas
obtain half-full s or p sublevels
obtain 18 electrons in the outer shell
none of the above
6) The first step in ionic bonding is the:
(a) sharing of electrons
(b) creation of electrons
(c) transfer of protons
(d) transfer of electrons to obtain stable configurations
(e) none of the above
7) What is the formula when aluminum and sulfur form an ionic compound?
(a) AlS
(b) Al2S
(c) Al3S2
(d) Al2S3
8) What is the formula of copper(I)sulfate?
(a) CuSO4
(b) Cu(SO4)2
(c) Cu2SO4
(d) Cu2(SO4)3
9) Which of the metals below has the same charge whenever it forms ionic
compounds?
(a) Co
(b) Cr
(c) Ni
(d) Zn
(e) Fe
(d) SO2
(e) none of these
10) Which of the compounds below is ionic?
(a) H2O
(b) NaOH
(c) H2O2
11) What is the correct name for CrO3?
(a)
(b)
(c)
(d)
(e)
chromium oxide
chromium(I) oxide
chromium(I) trioxide
chromium(III) oxide
chromium(VI) oxide
12) What is the correct formula for silver sulfate?
(a)
(b)
(c)
(d)
(e)
Ag2S
Ag2SO4
AgS
AgSO4
AgS2
13) What is the correct name for Fe2O3?
(a)
(b)
(c)
(d)
iron oxide
iron(II) oxide
iron(III) oxide
iron trioxide
14) When will an ionic compound typically conduct electricity?
(a)
(b)
(c)
(d)
(e)
when in the molten state
when dissolved in water
when in the solid state
both (a) and (b)
both (a) and (c)
15) Which of the following is not a property of ionic compounds?
(a)
(b)
(c)
(d)
(e)
low melting point
high boiling point
conduct electricity in aqueous solution
solids at room temperature
shatter easily when struck with a hammer
16) Which of the following would you expect to have the highest melting point?
(a) CaS
(b) CaCl2
(c) SrBr2
(d) KI
17) Which of the following is not a property of metals?
(a)
(b)
(c)
(d)
(e)
malleable
ductile
conducts electricity
brittle
lustrous
18) The model of metallic bonding is best described as:
(a)
(b)
(c)
(d)
(e)
alternating positive and negative charges in an ordered array
cations embedded in a sea of mobile valence electrons
alternating protons and electrons
alternating anions and cations
anions floating amidst many protons
19) A mixture of mercury and another metal is called:
(a) an amalgalm
(b) brass (c) bronze
(d) sterling
20) Choose the term that best completes the second relationship:
pipe:water
(a)
(b)
(c)
(d)
metal: _______
ions
ionic bond
electrons
conductor
(e) none
of these
Chapter 14 Portion: Essay/Short Answer
Part I
Draw the Lewis structure for each of the following molecules. Make sure to
include all lone pairs. Draw and state the shape for each molecule, and show the
approximate angles that exist within the molecule. (4 each)
1) H2O
2) PH3
3) COCl2
4) CO
5) BF3
6) CCl4
7) SO4-2
8) CO3-2
9) NH4+
10) PO3-3
Part II
Draw the Lewis structures for each of the following: (5 each)
1) XeF3+
2) PBr5
Part III – Short Answer (10 each)
1) The carbonate ion (CO3-2) demonstrates resonance. Draw all possible
resonance structures for this ion, and explain (in a sentence or two) what
is meant by the term resonance.
2) Both compounds below violate the octet rule. Draw a structure for each,
and state why each violates the octet rule.
(a) NO2
(b) BeH2
3) The hydronium ion (H3O+) can be formed from water and a hydrogen ion.
Use this ion to explain the meaning of a coordinate covalent bond.
Part IV
In the chart below, draw the Lewis Dot Structure, state the shape, state whether
the molecule has polar bonds or not, and state whether the molecule is polar or
not. A table of electronegativity values appears below.
MOLECULE
LEWIS
STRUCTURE
OF2
NF3
BCl3
CS2
BeCl2
Table of Electronegativities
SHAPE
(NAME)
POLAR
BONDS?
(YES or NO)
POLAR
MOLECULE?
(YES or NO)
Part V (Essay)
Compare and contrast ionic, covalent, and metallic bonding. (20 points)