Table of Anions

Monoatomic anions

_______ are easy because they all end in “-ide” (though they have diffferent charges)

"-ide"

Monoatomic anions are easy because they all end in ______ (though they have different charges)

a. "-ide"

b. "-ite"

c. "-ate"

Polyatomic anions

Several ________ are nearly identical and have the same charges but have different oxygen counts.

a. Monoatomic anions

b. Polyatomic anions

TRUE

TRUE OR FALSE:

Several polyatomic anions are nearly identical and have the same charges but have different oxygen counts:

• "-ite" — has less oxygens (e.g. sulfite, nitrite)

• "-ate" — has more oxygens (e.g. sulfate, nitrate)

Anion	Name
F−	Fluoride
Cl−	Chloride
Br−	Bromide
I−	Iodide

Anion	Name
H−	Hydride
O−2	Oxide
S−2	Sulfide
N−3	Nitride

Examples of Monoatomic Anions

Anion	Name	Anion	Name
XO−	Hypohalite*	CrO4−2	Chromate
XO2−	Halite*	Cr2O7−2	Dichromate
XO3−	Halate*	BO3−3	Borate
XO4−	Perhalate*	B4O7−2	Tetraborate
OH−	Hydroxide	KMnO4−	Permanganate
O2−2​	Peroxide	CO3−2	Carbonate
CN−	Cyanide	HCO3−	Bicarbonate/hydrogen carbonate
CNO−	Cyanate	PO4−3	Orthophosphate/Tertiary phosphate
SCN−	Thiocyanate	HPO4−2	Biphosphate/Secondary phosphate/Hydrogen phosphate
NO2−	Nitrite	H2PO4−	Primary phosphate/Dihydrogen phosphate
NO3−	Nitrate	Fe(CN)6−4	Ferrocyanide
SO3−2	Sulfite	Fe(CN)6−3	Ferricyanide
SO4−2	Sulfate	S2O3−2	Thiosulfate

• Just replace the "-hal-" part with the halogen name

e.g.
ClO−: Hypochlorite
ClO2−​: Chlorite
ClO3−​: Chlorate
ClO4−: Perchlorate

Examples of Polyatomic Anions