1.

use Mendeleevs periodic the formulae for the oxides of the following elements: K,C,AL,Si,Ba

Answer» Ba - group 2:general formula RO :formula of its oxide - BaO
Si - group 4 :general formula - RO2 :formula for its oxide - SiO2
Al - group 3, general formula - R2O3:formula for its oxide - Al2O3
C-group 4 - general formula - RO2, :formula of its oxide - CO2
K-- group 1 -- general formula -- R2O, :formula of its oxide - K2O


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