Use Mendeleev's periodic table to predict the formulae for the oxides of the following elements : K, C, AI, Si, Ba

Question

Philoid · Accepted Answer

The general formula for the oxidess of group I, II, III and IV are R₂O, RO, R₂O₃ and RO₂. Here R represent the element.

(i) The element K belongs to group I of Mendeleev’s peiodic table, thus the formula of its oxide will be K₂O.

(ii) The element C belongs to group IV of Mendeleev’s periodic table, thus the formula of its oxide will be CO₂.

(iii)The element Al (aluminium) belongs to group III of mendeleev’s periodic table, thus the formula of its oxide will be Al₂O₃.

(iv) The element Si (silicon) belongs to group IV of Mendeleev’s periodic table, thus the formula of its oxide will be SiO₂ .

(v) The element Ba (barium) belongs to group II of Mendeleev’s periodic table thus the formula of its oxide will be BaO.