Formula of cupric oxide
Cu2O
CuO
FeO
Fe2O3
Example for anion ?
Barium
Aluminum
Arsenic
Carbonate
Whose method about symbol system is considered as the basic of modern system of chemical symbols and formulae?
Dalton
Avogadro
Johann Berzelius
Al chemists
Example for monovalent electro positive
Aluminium
Ammonium
Zinc
Valency of Mg in Magnesium chloride
2+
5
2-
3+
Molecular mass of carbon dioxide is
16
32
44
28
Example for cation
Acetate
Sulphate
Fluoride
Empirical formula of Hydrogen peroxide .
CH
C6H6
H2O2
OH
Variable valency of gold is
1,2
1,3
2,3
3,5
Which one is binary acid
H2SO4
HF
HNO3
None of these
