Polyatomic Ions

Front 1

Polyatomic Cation:

Mercury(1) or mercurous

Back 1

HG2+2

Front 2

Polyatomic Cation:

Ammonium

Back 2

NH4+

Front 3

Polyatomic Cation:

Hydronium

Back 3

H30+

Front 4

Borate

Back 4

BO3-3

Front 5

Carbonate

Back 5

CO3-2

Front 6

Bicarbonate or Hydrogen Carbonate

Back 6

HCO3-

Front 7

Nitrate

Back 7

NO3-

Front 8

Chlorate

Back 8

ClO3-

Front 9

Bromate

Back 9

BrO3-

Front 10

Iodate

Back 10

IO3-

Front 11

Phosphate

Back 11

PO4-3

Front 12

Hydrogen Phosphate

Back 12

HPO4-2

Front 13

Dihydrogen Phosphate

Back 13

H2PO4-

Front 14

Arsenate

Back 14

AsO4-3

Front 15

Selenate

Back 15

SeO4-2

Front 16

Sulfate

Back 16

SO4-2

Front 17

Bisulfate or Hydrogen Sulfate

Back 17

HSO4-

Front 18

Perchlorate

Back 18

ClO4-

Front 19

Perbromate

Back 19

BrO4-

Front 20

Periodate

Back 20

IO4-

Front 21

permanganate

Back 21

MnO4-

Front 22

Chromate

Back 22

Cr04-2

Front 23

Dichromate

Back 23

Cr2O7-2

Front 24

molybdate

Back 24

MoO4-2

Front 25

Acetate

Back 25

C2H3O2- or C2H3OO-

Front 26

persulfate (or peroxydisulfate)

Back 26

S2O8-2

Front 27

thiosulfate

Back 27

S2O3-2

Front 28

dithionate

Back 28

S2O6-2

Front 29

Cyanate

Back 29

OCN-

Front 30

Thiocyanate

Back 30

SCN-

Front 31

Borite

Back 31

BO2-3

Front 32

Carbonite

Back 32

CO2-3

Front 33

Nitrite

Back 33

NO2-

Front 34

Chlorite

Back 34

ClO2-

Front 35

Bromite

Back 35

BrO2-

Front 36

Iodite

Back 36

IO2-

Front 37

Phosphite

Back 37

PO3-3

Front 38

Arsenite

Back 38

AsO3-3

Front 39

Selenite

Back 39

SeO3-2

Front 40

Sulfite

Back 40

SO3-2

Front 41

permanganate

Back 41

Mn04-

Front 42

Chromite

Back 42

CrO3-2

Front 43

Molydite

Back 43

MoO3-2

Front 44

dithionite

(This is an exception to the -ite suffix rule.)

Back 44

S2O4-2

Front 45

hypochlorite

Back 45

ClO-

Front 46

Hypochromite

Back 46

CrO2-2

Front 47

Hypomolydite

Back 47

MoO2-2

Front 48

hydroxide

Back 48

OH-

Front 49

Cyanide

Back 49

CN-

Front 50

Peroxide

Back 50

O2-2

Front 51

Superoxide

Back 51

O2-

Front 52

Carbide

Back 52

C2-2

Front 53

azide

Back 53

N3-
(note: this is different from nitride, N-3, which is monatomic)

Front 54

Note that, with a one exception (thiocyanate), the ions above with names ending with ___ or ___ have at least one oxygen atom and some other element. These ions are classified as ___.

Back 54

Ate or Ite

Classified as Oxoanions

Front 55

Polyatomic anions with names ending in ___ are classified as _________.

Back 55

Ide

Classified as Non-oxoanions.