acetate
arsenate
arsenite
benzoate
borate
bromate
carbonate
chlorate
chlorite
chromate
cyanate
cyanide
dichromate
1
1
H+
hydrogen
3
2
4
Li+
Be2+
lithium beryllium
11
12
Na+
Mg2+
sodium magnesium
19
20
K+
3
21
Ca2+
38
4
22
Sc3+
potassium calcium scandium
37
CH3COO–
AsO43–
AsO33–
C6H5COO–
BO33–
BrO3 –
CO32–
ClO3 –
ClO2 –
CrO42–
CNO–
CN–
Cr2O72–
39
Ti4+
Ti3+
40
Zr4+
55
72
24
7
Cr3+
Nb5+
42
Mn4+
26
Fe3+
Fe2+
iron (II)
Ru3+
27
cobalt (II)
Co3+
73
28
Ni2+
nickel (II)
Ni3+
nickel (III)
45
46
Pd2+
29
Cu+
47
75
tungsten
76
paladium(IV)
Re7+
rhenium
77
Os4+
osmium
78
Ir4+
Fe2+
13
7
B
C
boron
carbon
13
14
Si
aluminum
31
zinc
gallium
48
silicon
32
Ga3+
49
Cd2+
In3+
silver
cadmium
indium
Tl+
platinum(II)
gold (I)
64
65
Hg22+
P3-
33
9
O2-
oxide
16
He
10
F-
Ne
fluoride
17
S2-
Cl-
neon
18
Ar
34
As3-
35
Se2-
36
Br-
Kr
germanium arsenide selenide bromide krypton
Sn4+
51
Sb3+
52
Sn2+
82
Tl3+
mercury (I) thallium(III)
Pb2+
53
Te2-
tin (IV) antimony(III)
tin (II)
Au+
H-
phosphide sulfide chloride argon
Ge4+
50
Ag+
nitride
8
18
2
hydride helium
16
N3-
15
Al3+
Pt4+ 79 Au3+ 80 Hg2+ 81
Pt2+
1
15
6
platinum(IV) gold (III) mercury (II) thallium (I)
iridium
17
(IUPAC)
14
5
Zn2+
copper (I)
ion
charge
ion
name
iron (II)
30
copper (II)
KEY
Fe3+
iron (III)
12
Cu2+
26
symbol
NH4
H3O+
11
cobalt (III)
ruthenium(IV)
74
atomic
number
+
ammonium
hydronium
10
Co2+
PERIODIC TABLE OF IONS
POSITIVE POLYATOMIC IONS
9
iron (III)
44
niobium(III)
tantalum
54
I-
Sb5+ telluride iodide
antimony(V)
83
Bi3+
84
Po2+
85
Po4+
astatide radon
70
71
lead (II) bismuth(III) polonium(II)
Pb4+
Bi5+
68
69
Xe
xenon
86
At-
Rn
lead (IV) bismuth(V) polonium(IV)
89
Ra2+
Ac3+
francium radium
actinium
Fr+
HSO4 –
HS–
HSO3 –
OH–
ClO–
IO3 –
HPO42–
NO3 –
NO2 –
SiO44–
C2O42–
ClO4 –
IO4 –
MnO4 –
O22–
PO43–
P2O74–
SO42–
SO32–
SCN–
S2O32–
oxalate
perchlorate
periodate
permanganate
peroxide
phosphate
pyrophosphate
sulfate
sulfite
thiocyanate
thiosulfate
Mo6+ Tc7+ ruthenium(III) Rh3+ paladium(II)
3+
Nb molybdenum technitium Ru4+ rhodium
Pd4+
cesium barium lanthanum hafnium
88
Mn2+
niobium (V)
W6+
87
H2PO4
HCO3 –
HC2O4 –
8
43
Ta5+
Ba2+
25
Cr2+
Hf4+
Cs+
La3+
V3+
V5+
41
zirconium
57
6
titanium (III) vanadium (V) chromium (II) manganese(IV)
rubidium strontium yttrium
56
23
–
dihydrogen phosphate
hydrogen carbonate
hydrogen oxalate
hydrogen sulfate
hydrogen sulfide
hydrogen sulfite
hydroxide
hypochlorite
iodate
monohydrogen phosphate
nitrate
nitrite
orthosilicate
titanium (IV) vanadium(III) chromium (III) manganese(II)
Y3+
Rb+ Sr2+
5
TABLE OF POLYATOMIC IONS
58
59
Ce3+
cerium
90
Pr3+
thorium
61
Nd3+
62
Pm3+
praseodymium neodymium promethium
91
Th4+
60
Pa5+
92
U6+
protactinium(V) uranium (VI)
93
63
Eu3+
Gd3+
samarium(III) europium (III)
66
Tb3+
Sm2+ Eu2+ gadolinium terbium
samarium(II) europium (II)
94
Np5+
Sm3+
Pu4+
95
Am3+
plutonium(IV) americium(III)
Pa4+
U4+ neptunium Pu6+ Am4+
plutonium(VI) americium(IV)
protactinium(IV) uranium (IV)
96
Cm3+
curium
97
67
Dy3+
Ho3+
dysprosium holmium
Er3+
98
Bk4+
californium einsteinium fermium
berkelium(IV)
99
Cf3+
Es3+
ytterbium(III)
Lu3+
Yb2+ lutetium
ytterbium(II)
100
101
Md2+ 102 No2+ 103
Fm3+ mendelevium (II) nobelium(II) Lr3+
erbium
Bk3+
berkelium(III)
Tm3+
Yb3+
thulium
Md3+ No3+
mendelevium (III) nobelium(III)
lawrencium