Which among the following formulae of elements was used by Mendeleev for giving the classification?
Sulphides
Carbonate
Nitrides
Oxides
The formulae of hydrides and oxides formed by elements were treated as one of the basic properties of an element for its classification.
The correct formula of the oxide of Eka-aluminium element predicted by Mendeleev was :
(a) EaO3 (b) Ea3O2 (c) Ea2O3 (d) EaO