Chemical Formula Writing Worksheet
Determine the chemicalformula for each cation and anion combination. Write your answers in each box.
Set 1 (The combining power of silver is 1 and zinc is 2)
\nions
chloride
oxide
iodide
hydride
sulfide
bromide
oxide
fluoride
astatide
selenide
nitride
+\
Cations
Sodium
Potassium
Magnesium
Calcium
Copper(ll)
lron(ll)
lron(lll)
Silver
Zinc
Aluminum
Anions
Cations
Lithium
Barium
Cesium
Strontium
Copper(l)
Copper(ll)
Lead(ll)
Lead{lV)
Gallium
Nickel(!l)
+
phosphide
Chemica! Formula Writing Worksheet
Determine the chemicalformula for each cation and anion combination. Write your answers in each box.
Brackets are only needed when the polyatomic group is greater than 1. Eg. Strontium phosphate, Sr3(POa)2
Set 3 (The combining power of silver is 1 and zinc is 2. The formula for the ammonium ion is NHa*)
Anions
Cations
nitrate
sulfate
hydroxide
carbonate
phosphate
NOs-
Soo2-
oH-
Cos2-
Poo3-
hydrogen
carbonate
HCOs-
+
Sodium
Potassium
Magnesium
Barium
lron{ll)
tron(l1l)
Silver
Zinc
Aluminum
Ammonium
Set 4 {The combining power of sitver is 1 and zinc is 2. The formula for the ammonium ion is NHa*)
Anions
nitrite
Noz-
Cations
chromate
.
CrOq?-
sulfite,
dichromate
chlorate
acetate*
soa2-
CrsO72'
ClOg'
cH3coo-
+
Lithium
Mercury(t)
Tin(ll)
Silver
lron(ll)
lron(lll)
Barium
Zinc
Aluminum
Ammonium
*The acetate group,
CH3COO- is
written first as this correctly shows the position of the ionic bond.
Eg. CH3COO-Na*
Naming Compounds (lonic & Covalent)
Naming lonic Compounds (salts)
L. Write the full name of the first element or the positive ion (cation).
2. Write the root of the second element or the negative ion (anion).
Examples: The root of Fluorine is Fluor-, the root of Chlorine is ChlorReplace the ending of the negative ion (anion) name with the suffix -ide
a.
3.
lonic Compound Chemical Formula
Al3* and Br-
)
Be2* and 02-
)
tonic Compound Name
AlBrs
Beo
K*+N3-)KsN
Ba2* + (CrO+)2-
)
Ba(CrO+)
Cs*+F-)CsF
(NH+)*+52-)(NH:)zS
Mg,**Cl-)MgClz
83*+l-)Bl:
Na*+(SO+)2-)Naz(sO+)
Sia* + (CzHgOr)-
)
Si(CzHsOz)a
Mg2*+N3-)MgaNz
Ca2*+Cl-)CaClz
Ca2*+(Coa)2-)Ca(Cos)
(NH+)*+
(oHI )
(NH+XOH)
Sr2*+Br-)SrBrz
Be2* + (MnO+)-
)
Be(MnO+)z
Mg2*+Cl,)MgClz
K*+ (PO+)3-)
Ka(PO+)
Polyatomic lon Names:
Ammonium: (NHc)* Acetate: (CzHaOz)- Hydroxide: (OH)- Permansanate: (MnO+)- Phosphate: (PO+)3- Sulfate:
Carbonate: (COr)2- Chromate (CrO+)z-
(SOa)2-
NaminF Covalent Compounds
1. Write the full name of the first element in the chemical formula.
a. Add a prefix to the first name if there are two or more atoms as indicated in the chemical formula.
2. Write the root of the name of the second element in the chemical formula.
a. Add the suffix -ide.
b. Add a prefix to the name indicating the number of atoms present in the chemical formula.
3.
Prefixesare:1= mono,2=di,3=tri,4=tetra,5= penta,6= hexa,7 = hepta, S=octa,9= fionit, 10=deca
Write the Names for the Followins Covalent Compounds
1.
P+Ss
11.
CoHo
2.
COz
L2.
PFa
3.
SeFo
13.
BFs
4.
SizBro
L4.
PzOa
5.
SCh
15. SzCl:
6.
CHr
L6. NOz
7.
BzSi
L7. OFz
8.
NF:
18.
9.
NzOs
19. BrOa
10.
SeBre
20.
CO
CBrq
Write the Formulas forthe Followine Covalent Compounds
1.
Antimony Tribromide
11. Dinitrogen Monoxide
2.
Hexaboron Silicide
72. Tetra phosphorus Decaoxide
3.
Chlorine Dioxide
13. Selenium Trioxide
4.
Hydrogen lodide
14. lodine Heptafluoride
5.
lodine Penafluoride
15, Sulfur Hexafluoride
6.
Dinitrogen Trioxide
16. Sulfur Dichloride
7.
PhosphorusTriiodide
17. Disilicon Hexabromide
8.
Dihydrogen monoxide
18. Dichlorine Heptaoxide
9.
PhosphorusTrihydride
19. Pentaphosphorus Decoxide
10. Carbon Tetrachloride
20. Arsenic Tribromide