Principles of General, Organic and Biological Chemistry

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Hom ework Unit B
–
Subm it your answers via D2L
1.
Which is not an ionic compound?
A)
KCl
B)
Ca(NO
3
)
2
C)
CBr
4
D)
AlBr
3
2.
Which is not a covalent compound?
A)
Br
2
B)
NO
2
C)
NH
3
D)
NaNO
2
E)
More than one of the compounds above is not a covalent compound.
3.
What is the ion symbol for an atom with 20 protons and 18 electrons?
A)
Ca
B)
Ca
2+
C)
Ar
D)
Ar
2+
E)
Ar
2
–
4.
Metals form _____.
A)
anions
B)
cations
C)
anions and cations
5.
What is the ion symbol for an atom with 16 protons and 18 electrons?
A)
S
2
–
B)
S
C)
Ar
D)
Ar
2+
E)
Ar
2
–
6.
What is the charge of the ions formed by group 7A elements?
A)
+1
B)
+7
C)
–
1
D)
–
7
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7.
Which element has a variable charge?
A)
Mg
B)
Mn
C)
Al
D)
Ag
E)
More than one of the above elements can have a variable charge.
8.
Which pair of elements will form ionic compounds?
A)
sulfur and oxygen
B)
copper and iron
C)
iron and chlorine
D)
bromine and oxygen
9.
Which ionic compound is formed when aluminum and sulfur combine?
A)
AlS
B)
Al
2
S
3
C)
AlS
3
D)
Al
2
S
E)
Al
3
S
2
10.
What is the correct name for CuCl?
A)
copper chloride
B)
copper(I) chloride
C)
copper(II) chloride
D)
chlorocopper
E)
chlorocopper(I)
11.
What is the name of the SO
3
2
–
ion?
A)
sulfide ion
B)
sulfate ion
C)
sulfite ion
D)
bisulfate ion
12.
What is the correct chemical formula of tin(IV) cyanide?
A)
Ti(CN)
4
B)
TiC
4
N
4
C)
Sn(CN)
4
D)
SnC
4
N
4
E)
Sn(CN)
2
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13.
The formula for zinc acetate is _____.
A)
ZnCH
3
CO
2
B)
Zn(CH
3
CO
2
)
2
C)
Zn(HCO
3
)
2
D)
Zn(HCl)
8
14.
Which chemical formula is not correct?
A)
Na
2
HCO
3
B)
Na
2
HPO
3
C)
Na
2
HPO
4
D)
Na
2
SO
3
E)
More than one of the above formulas is not