Polyatomic Ions
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
Polyatomic Ions
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Polyatomic Ions - charged particles
composed of several atoms bonded
together.
Polyatomic ions containing oxygen are
called oxyanions.
There are several series of polyatomic
ions where there are different
numbers of oxygen atoms.
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
Compounds with polyatomic
ions
 Compounds with
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polyatomic ions are NOT
binary (this should be
your hint!)
We needed to memorize
polyatomic ions because
we cannot get their
names or formulas from
the periodic table!
Remember polyatomic
ions are a group of
many atoms and
CANNOT be broken up.
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
dihydrogen phosphate
H2PO4
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
Acetate or ethanoate
C2H3O2
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
hydrogen sulfite
(bisulfite)
HSO3
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
hydrogen sulfate
(bisulfate)
HSO4
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
hydrogen carbonate
(bicarbonate)
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
nitrite
NO2
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
nitrate
NO3
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
cyanide
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
hydroxide
OH
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
permanganate
MnO4
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
hypochlorite
ClO
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
chlorite
ClO2
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You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
chlorate
ClO3
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
perchlorate
ClO4
-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
hydrogen phosphate
HPO4
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
oxalate
C2O4
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
sulfite
SO3
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
sulfate
SO4
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
carbonate
CO3
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
chromate
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
dichromate
Cr2O7
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
silicate
SiO3
2-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
phosphite
PO3
3-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
phosphate
PO4
3-
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
ammonium
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.
Helpful Way to remember the polyatomic ions
Nick the camel ate a clam supper in Phoenix with Crista
# of consonants = # of oxygen atoms
# of vowels = charge
Nick – nitrate – NO31camel– carbonate – CO32ate – to help you remember your –ate endings
clam – chlorate – ClO31supper – sulfate – SO42Phoenix – phosphate – PO43Crista – chromate – CrO42-ite polyatomic ion endings are one less oxygen
You will learn the names for common polyatomic ions and how to use them in naming and writing compounds.