Question

180 21. Based on the group valency of elements, write the molecular formula of the following compounds
giving justification for each:
(1) Oxides of first group elements.
(1) Halides of the elements of group 13, and
(1) Compounds formed when an element A of group 2 combines with an element B of group 17
te Waite chemical equation in support​

Answer 1

Answer:

Explanation:

A2O – Valency of group one is 1 and of oxygen is 2

but higher elements like K, Na, Cs, Etc., form peroxides and superoxides

AX3 – Valency of group 13 is 3 and of halogen is 1

AX2- Valency of G2 is 2 and halogen is 1

eg., Mg+ Cl2= MgCl2