Chemistry Unit 4 Test - Bonding
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Which of the following formulas represents an ionic compound?
a. CS
c. N O
b. BaI
d. PCl
____
2. Which of the following formulas represents a molecular compound?
a. ZnO
c. SO
b. Xe
d. BeF
____
____
3. Which of the following covalent bonds is the most polar?
a. H—F
c. H—H
b. H—C
d. H—N
4. A bond formed between a silicon atom and an oxygen atom is likely to be ____.
a. ionic
c. polar covalent
b. coordinate covalent
d. nonpolar covalent
5. Which of the following atoms acquires the most negative charge in a covalent bond with hydrogen?
a. C
c. O
b. Na
d. S
6. How many valence electrons are in a silicon atom?
a. 2
c. 6
b. 4
d. 8
7. Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in
diatomic oxygen molecules?
a. unvalenced pair
c. inner pair
b. outer pair
d. unshared pair
8. Which Lewis electron-dot structure is drawn correctly for the atom it represents?
____
a. 1
c. 3
b. 2
d. 4
9. Which Lewis electron-dot diagram represents chloroethene (
____
____
____
____
a. 1
c. 3
)?
b. 2
____ 10. What is the formula for potassium sulfide?
a. KS
b. K S
d. 4
c. KS
d. K S
____ 11. What is the formula of sodium nitride?
a. NaN
b. Na N
c. Na N
d. NaN
____ 12. What is the formula of aluminum oxide?
a. AlO
b. Al O
c. AlO
d. Al O
____ 13. Which of the following compounds contains the Mn ion?
a. MnS
c. Mn O
b. MnBr
d. MnO
____ 14. How are chemical formulas of binary ionic compounds generally written?
a. cation on left, anion on right
b. anion on left, cation on right
c. Roman numeral first, then anion, then cation
d. subscripts first, then ions
____ 15. Which of the following shows correctly an ion pair and the ionic compound the two ions form?
a. Sn , N ; Sn N
c. Cr , I ; CrI
b. Cu , O ; Cu O
d. Fe , O ; Fe O
____ 16. What is the correct formula for barium chlorate?
a. Ba(ClO)
c. Ba(ClO )
b. Ba(ClO )
d. BaCl
____ 17. Which of the following compounds contains the lead(II) ion?
a. PbO
c. Pb2O
b. PbCl4
d. Pb2S
____ 18. What is the correct formula for potassium sulfite?
a. KHSO
c. K SO
b. KHSO
d. K SO
____ 19. Select the correct formula for sulfur hexafluoride.
a. S F
c. F S
b. F SO
d. SF
____ 20. Which of the following is the correct name for N O ?
a. nitrous oxide
c. nitrogen dioxide
b. dinitrogen pentoxide
d. nitrate oxide
____ 21. What is the correct name for the compound CoCl ?
a. cobalt(I) chlorate
c. cobalt(II) chlorate
b. cobalt(I) chloride
d. cobalt(II) chloride
____ 22. What is the correct name for Sn (PO ) ?
a. tritin diphosphate
c. tin(III) phosphate
b. tin(II) phosphate
d. tin(IV) phosphate
____ 23. What is the name of the ionic compound formed from lithium and bromine?
a. lithium bromine
c. lithium bromium
b. lithium bromide
d. lithium bromate
____ 24. Which of the following correctly shows a prefix used in naming binary molecular compounds with its
corresponding number?
a. deca-, 7
c. hexa-, 8
b. nona-, 9
d. octa-, 4
____ 25. Which set of chemical name and chemical formula for the same compound is correct?
a. iron(II) oxide, Fe O
c. tin(IV) bromide, SnBr
b. aluminum fluorate, AlF
d. potassium chloride, K Cl
____ 26. Which of the following compounds has the formula KNO ?
a. potassium nitrate
c. potassium nitrite
b. potassium nitride
d. potassium nitrogen oxide
____ 27. In which of the following is the name and formula given correctly?
a. sodium oxide, NaO
c. cobaltous chloride, CoCl
b. barium nitride, BaN
d. stannic fluoride, SnF
Short Answer
28. Draw a Lewis dot structure for an atom of chlorine (Cl) and oxygen (O). [2 points]
29. Write a Lewis dot structure for a molecule of Cl2O. Be sure to draw in all the lone pairs. [2 points]
30. Draw a Lewis dot structure for NaCl. Be sure to include all lone pairs. [2 points]
31. What is the correct name for N2O3?
32. A) What is an intermolecular force?
B) What is one consequence of strong intermolecular forces?
C) Which has stronger intermolecular forces, HF or HCl? JUSTIFY YOUR ANSWER. [2 points]
33. [4 points] Compare and contrast ionic and covalent bonds. Be sure to include two differences and two
similarities.
Chemistry Unit 4 Test - Bonding
Answer Section
MULTIPLE CHOICE
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B
C
A
C
C
B
D
D
A
B
C
D
C
A
D
C
A
C
D
B
D
B
B
B
C
A
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DIF:
L2
L2
L3
L2
L2
L1
L1
ASDF
ASDF
L2
L2
L2
L1
L1
L2
L3
L2
L2
L2
L2
L2
L3
L2
L2
L2
L2
STA:
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B.8.C.3
B.8.C.3
B.8.C.3
B.8.C.3
B.8.C.3
B.9.C.1
B.9.C.1
B.9.C.1
B.9.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.1
P.5.C.2
P.5.C.2
P.5.C.2
P.5.C.2
P.5.C.2
P.5.C.2
P.5.C.2
27. ANS: D
DIF: L2
STA: P.5.C.2
SHORT ANSWER
28. ANS:
Cl with 7 dots
O with 6 dots
DIF: ASDF
STA: B.9.C.1
29. ANS:
1 pt for Cl-O-Cl
1 pt for all the lone pairs.
DIF: ASDF
STA: B.9.C.1
30. ANS:
1 pt for passing 1 e- from Na to Cl
1 pt for charges
DIF: ASDF
STA: B.9.C.1
31. ANS:
Dinitrogen Trioxide
(1 pt. for each word)
STA: P.5.C.2
32. ANS:
A) force that acts between two molecules
B) higher boiling point
C) HF b/c the difference in electronegativity is higher, so the compound is more polar.
STA: B.9.C.4
33. ANS:
-both involve e-both involve the joining of different elements
-CB are btwn 2 nonmetals and IB are btwn a metal and a nonmetal
-In CB, e- are shared while in IB, e- are passed
STA: Phys. Sci. Rev.