Using the periodic table, predict the formula of compound formed between an element X of group 13 and another element Y of group 16.

What is the formula of binary compound formed between : 2nd element of II group and 1st element of 17th group ?

Using the periodic table predict the formula of compound which might be formed by the following pair of elements: silicon and bromine

Using the Periodic Table, predict the formulae of compounds which might be formed by the following pairs of elements, silicon and bromine

Using the Periodic Table, predict the formulae of compounds which might be formed by the following pairs of elements, aluminium and sulphur.

An element X belongs to group 17 and third period of the periodic table Give the formula of the compound formed when it combines with an element Y having valency three?

Based on the group valency of elements state the formula for the following giving justification for each : (i) Oxides of 1st group elements, (ii) Halides of the elements of group 13, (iii) Compounds formed when an element of group 2 combines with an element of group 16.

Based on the group valency of elements write the molecular formula of the following compounds giving justification for each : Compound formed when an element, A of group 2 combines with an element B of group seventeen.