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WorksheetsChemical Formulas
Total questions: 40
Worksheet time: 35mins
Name
Class
Date
1.
The chemical formula for an ionic compound of aluminum and chlorine is
a)
AlCl.
b)
ClAl.
c)
AlCl3.
d)
Al3Cl.
2.
MgF2
a)
magnesium fluoride
b)
manganese Phosphide
c)
magnesium(III) fluoride
d)
magnesium fluoride(II)
3.
If it is brittle, dissolves easily in water, has a high melting point, and conducts electric current, it is a(n)
a)
valence electron
b)
ionic compound
c)
covalent compound
d)
sugar
4.
The correct formula for magnesium oxide is
a)
Mg2O
b)
MgO
c)
MgO2
d)
Mg2O3
5.
Na + and S -2
a)
Na2S
b)
NaS2
c)
Na2S2
d)
NaS
6.
LiBr is called
a)
lithium bromine
b)
lithium (I) bromine
c)
lithium bromide
d)
lithuim (I) bromide
7.
CaI2
a)
calcium diodide
b)
calcium iodide
c)
calcium iodate
d)
calcium iodine
8.
The chemical formula of magnesium phosphide is
a)
MgP
b)
Mg₂P₃
c)
Mg₃P₂
d)
Mg₃(PO₄)₂
9.
Al+3, S-2
a)
AlS3
b)
Al2S3
c)
S3Al2
10.
What is the formula for Phosphorous Trichloride?
a)
P₃Cl
b)
PCl₃
c)
KCl₃
d)
K₃Cl
11.
What is the formula for Aluminum Chlorate?
a)
NH₄ClO₃
b)
NH₄ClO₂
c)
AlClO₃
d)
Al(ClO₃)₃
12.
What is the formula for sodium phosphate?
a)
Na3PO4
b)
Na3PO3
c)
Na3P
d)
Na3PO
13.
What is the formula for calcium carbonate?
a)
CaCO
b)
CaCO2
c)
CaCO3
d)
Ca3CO3
14.
Magnesium and Chlorine form ?
a)
MgCl
b)
Mg2Cl
c)
MgCl2
d)
I refuse to answer on the grounds that it might make me look less smart than I really am.
15.
Cesium and Oxygen form ?
a)
CsO
b)
Cs2O
c)
CsO2
d)
CsO3
16.
Sodium and Nitrogen form ?
a)
NaN
b)
Na2N
c)
Na3N
d)
NaN2
17.
Barium and Selenium form ?
a)
BaSe
b)
Ba2Se
c)
Ba2Se2
d)
BaSe2
18.
What is the formula for Lead II Phosphate?
a)
Pb₃(PO₃)₂
b)
Pb₃(PO₄)₂
c)
Pb₂PO₄
d)
Pb₂P
19.
What is the formula for Sodium Hydrogen Carbonate?
a)
NaHCO₃
b)
S₂CO₃
c)
Na₂CO₃
d)
Na(CO₃)₂
20.
What is the formula for Copper II Sulfide?
a)
CuS
b)
Cu₂S
c)
CuS₂
d)
CuSO₃
21.
What is the formula for Dichlorine Monoxide?
a)
Co₃O
b)
ClO₂
c)
Cl₂O
d)
(Cl₂)₂O
22.
What is the formula for Aluminum Phosphide?
a)
Al₃P₃
b)
AlP
c)
AlPO₄
d)
AlPO₃
23.
What is the formula for Hydrochloric acid?
a)
HClO
b)
ClO₃
c)
HCl
d)
HCO₃
24.
What is the correct name for Cr(OH)₂
a)
Chromium dihydroxide
b)
Chromium II hydroxide
c)
Chromium oxyhydride
d)
Chromium III hydroxide
25.
What is the correct name for P₃Cl₆?
a)
Potassium chloride
b)
Phosphorous chloride
c)
Triphosphorous hexachloride
d)
Tetraphosphorous heptachloride
26.
What is the correct name for SO₂?
a)
Sulfur oxide
b)
Sulfite
c)
Sulfur dioxide
d)
Sulfur II Oxide
27.
What is the correct name for CoCl₂?
a)
Copper II Chloride
b)
Cobalt Chlorine
c)
Cobalt II Chloride
d)
Cobalt Dichloride
28.
What is the FORMULA for
ammonium sulfide
ammonium sulfide
a)
(NH4)2S
b)
NH4 S
c)
(NH4)2S4
d)
NH2S
29.
How do the following two elements bond together?
Pb4+ O2-
Pb4+ O2-
a)
PbO
b)
Pb4O2
c)
PbO2
d)
Pb2O4
30.
When adding a subscript to a polyatomic ion, you should...
a)
multiply any subscripts on the polyatomic ion by the subscript you are adding
b)
put parentheses around the polyatomic ion before adding a subscript
c)
write the new subscript next to any subscripts on the polyatomic ion
d)
put the polyatomic ion in square brackets before adding the subscript
31.
Ionic compounds are written with
a)
cation (+ ion) first then anion (- ion)
b)
anion (- ion) first then cation (+ ion)
c)
either way is fine
d)
polyatomic ions first
32.
Metals & ammonium ion (NH4+1) are found in _____ compounds.
a)
molecular (covalently bonded)
b)
ionic
33.
Compounds that don't have metals in them are
a)
molecular compounds
b)
ionic compounds
34.
Compounds that use numerical prefixes, like tetra-, di-, penta-, etc., are ____ and they do not have metals or ammonium ion ion in them.
a)
molecular
b)
ionic
35.
Compounds that begin with Hydrogen in the formula, such as H2SO4, are best classified as ..
a)
ionic compounds
b)
molecular compounds
c)
acids
36.
HCl is most appropriately called...
a)
hydrochloric acid
b)
chloric acid
c)
chlorous acid
d)
hydrogen chloride
37.
HNO3 is most appropriately named....
a)
hydrogen nitrate
b)
hydrogen nitrogen trioxide
c)
nitric acid
d)
hydronitric acid
38.
H2SO4 is most appropriately named...
a)
sulfuric acid
b)
hydrosulfuric acid
c)
dihydrogen monosulfur tetroxide
d)
hydrogen sulfate
39.
HC2H3O2 is most appropriately named....
a)
hydrogen acetate
b)
hydrogen dicarbon trihydrogen dioxide
c)
hydroacetic acid
d)
acetic acid or ethanoic acid
40.
If a metal in a name has a Roman Numeral after it, what are you being told?
a)
oxidation number of the nonmetal
b)
the subscript for the metal
c)
the subscript for the nonmetal
d)
oxidation number of the metal
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