RADICALS AND SYMBOLS:

Element
Symbol
Compound
Valency
Hydrogen
Silver
Sodium
Potassium
Ammonium
H+
Ag+
Na+
K+
NH4+

1
1
1
1
1
Copper

Cu+
Cu++
Cuprous or copper (I)
Cupric or copper (II)
1
2
Gold
Au+
Au+++
Aurous or gold (I)
Auric or gold (III)
1
3
Mercury
Hg+
Hg++
Mercurous or mercury (I)
Mercuric or mercury (II)
1
2
Lithium
Barium
Beryllium
Cadmium
Calcium
Cobalt
Li+
Ba++
Be++
Cd++
Ca++
Co++

1
2
2
2
2
2
Iron
Fe++
Fe+++
Ferrous or iron (II)
Ferric or iron (III)
2
3
Magnesium
Mg++

2
Manganese
Mn++
Mn+++
Manganous or manganese (II)
Manganic or manganese (III)
2
3
Nickel
Ni++

2
Lead
Pb++
Pb++++
Plumbous or lead (II)
Plumbic or lead (IV)
2
4
Tin
Sn++
Sn++++
Stannous or tin (II)
Stannic or tin (IV)
2
4
Strontium
Zinc
Aluminium
Sr++
Zn++
Al+++

2
2
3
Arsenic
As+++
As+++++ or  As5+
Arsenous or arsenic (III)
Arsenic or arsenic (V)
3
5
Bismuth
Bi+++

3
Antimony
Sb+++
Sb+++++ or Sb5+
Antimonous or antimony (III)
Antimonic or antimony (V)
3
5



SOME ELEMENTS, THEIR SYMBOLS AND 
VALENCIES


NAME
SYMBOL
VALENCY
NAME
SYMBOL
VALENCY
Acetate
CH3COO
1
Manganate
MnO42-
2
Bicarbonate
HCO3
1
Molybdate
MoO42-
2
Bisulphate
HSO4
1
Oxalate
C2O42-
2
Bisulphite
HSO3
1
Oxide
O2-
2
Bromide
Br
1
Peroxide
O22-
2
Chlorate
ClO3
1
Silicate
SiO32-
2
Chloride
Cl
1
Stannate
SnO32-
2
Cyanide
CN
1
Stannite
SnO22-
2
Cyanate
CNO
1
Chromate
CrO42-
2
Isocyanide
NC
1
Dichromate
Cr2O72-
2
Thiocyanate
CNS
1
Pyroborate
B4O72-
2
Hydride
H
1
Thiosulphate
S2O32-
2
Perchlorate
ClO4
1
Tetrathionate
S4O62-
2
Bisulphide
HS
1
Zincate
ZnO22-
2
Hydroxide
OH
1
Antimonite
SbO43-
3
Hypochlorite
ClO
1
Arsenate
AsO43-
3
Hypobromide
BrO
1
Borate
BO33-
3
Hypoiodide
IO
1
Carbonate
CO32-
2
Iodate
IO3
1
Sulphate
SO42-
2
Iodide
I
1
Sulphite
SO32-
2
Metaaluminate
AlO2
1
Sulphide
S2-
2
Metaborate
BO2
1
Nitride
N3-
3
Metaphospate
PO3
1
Phosphate
PO43-
3
Nitrate
NO3
1
Phosphite
PO33-
3
Nitrite
NO2
1
Phosphide
P3-
3
Permanganate
MnO4
1
Pryophosphate
P2O74-
4
Fluoride
F
1
Ferricyanide
[ Fe (CN)6]3-
3



Ferrocyanide
[ Fe (CN)6]4-
4






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