Name ___________________________________________________________ Date __________________
Ionic Compounds and Metals
Section 3 Names and Formulas for Ionic Compounds
Scan Section 3 of your text. Use the checklist below as a guide.
• Read all section titles.
• Read all boldfaced words.
• Read all tables and diagrams.
• Look at all figures and read the captions.
• Study the example problems and note what they are intended to solve.
• Think about what you already know about the formation, formulas, and
naming of ions and ionic compounds.
Write three facts that you discovered about the names and formulas of ionic
compounds.
Ionic compounds are named using a convention that involves the cation
followed by the anion
1. ______________________________________________________
The formulas of ionic compounds are determined based on the principle
of charge neutrality, where the total positive charge of the cations must
2. ______________________________________________________
balance the total negative charge of the anions.
Ionic compounds may have common systematic names or stock names,
especially for transition metal ions that can exhibit multiple charges.
3. ______________________________________________________
Use your text to define each term.
the chemical formula of an ionic compound that lists the ions in the lowest
formula unit
ratio that equals a neutral electrical charge.
________________________________________________________
monoatomic ion
________________________________________________________
oxidation number
a number assigned to an element in chemical combination which represents
the number of electrons lost ), by an atom of that element in the compound.
________________________________________________________
polyatomic ion
________________________________________________________
oxyanion
(as in the sulfate and carbonate ions).
________________________________________________________
An ion made of only one atom
an ion that contains more than one atom.
an anion containing one or more oxygen atoms bonded to another element
________________________________________________________
Define the following term.
transfer
Chemistry: Matter and Change
a chemical reaction (as a transamination) in which a group is transferred
from one molecule to another.
________________________________________________________
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Name ___________________________________________________________ Date __________________
Section 3 Names and Formulas for Ionic Compounds (continued)
Formula for an
Ionic Compound
Use with Example
Problem 1, page 220.
Solve Read Example Problem 1 in your text.
You Try It
Problem
Calcium can form a cation with a 2+ charge. Write the formula for the ionic
compound formed from calcium ion and chlorine.
1. Analyze the Problem
Known:
the ionic forms of the component elements
______________________________________________
Ca^2
CI^1and
______________________________________________
+
Unknown:
______________________________________________
2. Solve for the Unknown
two
The smallest number that is divisible by both ionic charges is ______,
one
two
so the compound contains _____ calcium ion(s) and _____ chloride
CaCl2
ion(s). The formula for the ionic compound formed is ________.
3. Evaluate the Answer
The overall charge on one formula unit of this compound is zero.
1
Formula for a
Polyatomic Ionic
Compound
Use with Example
Problem 3, page 222.
Ca ion(s) (2+/Ca ion) + 2
Cl ions (1− /Cl ion) = 0
Solve Read Example Problem 3 in your text.
You Try It
Problem
Write the formula for the ionic compound formed from the calcium ion and
the bromate ion.
1. Analyze the Problem
Known:
Ca^2+
the ionic forms of the component elements _______
BrO3^-
and _______
Unknown:
Chemistry: Matter and Change
The compound formed from the two ions
___________________________________________
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Science Notebook
Name ___________________________________________________________ Date __________________
Section 3 Names and Formulas for Ionic Compounds (continued)
2. Solve for the Unknown
two
The smallest number that is divisible by both ionic charges is ______,
two
one
so ______
bromate ions combine with _______
calcium ion. The
Ca(BrO3)2
formula for the ionic compound formed is __________.
3. Evaluate the Answer
The overall charge on one formula unit of this compound is zero.
1 Ca ion (2+/Ca ion) + 2
Names for Ions
and Ionic
Compounds
Use with page 222–224.
BrO3 ions (1−/BrO3 ion) = 0
Classify the ions listed below as monatomic or polyatomic cations or
anions. If the ion is a polyatomic anion, indicate whether it is an
oxyanion.
polyatomic anion
CN−
_______________________________________
MnO4−
_______________________________________
Ba2+
_______________________________________
Fe(CN)64−
_______________________________________
NH4+
_______________________________________
N3−
_______________________________________
Hg22+
_______________________________________
S2O32−
_______________________________________
O2−
_______________________________________
polyatomic anion , oxyanion
manatomic cation
polyatomic anion
polyatomic cation
monatomic anion
polyatomic cation
polyatomic anion , oxyanion
monaatomic anion
Identify the ionic compounds listed below.
Chemistry: Matter and Change
calcium oxide
CaO
_______________________________________
KMnO4
_______________________________________
Sr(IO3)2
_______________________________________
NH4OH
_______________________________________
Fe2S3
_______________________________________
Sn(NO3)4
_______________________________________
Pb3(PO4)2
_______________________________________
Hg2SO4
_______________________________________
PtCl4
_______________________________________
potassium permaganate
strontium iodate
ammonium hydroxide
iron (iii) sulfide
tin (iv) nitrate
Lead (ii) phosphate
mercury (i) sulfate
platinum (iv) chloride
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