Question

what type of oxides are formed when right side elements (halogens) combines with oxygen​

Answer 1

$\fbox\pink{A}\fbox\blue{n}\fbox\purple{s}\fbox\green{w}\fbox\red{e}\fbox\orange{r}$The reaction between oxygen and another element generally results in the formation of a binary compound known as an oxide. The reaction itself is known as oxidation. For example, the oxidation reaction between oxygen and sodium produces sodium oxide.

Answer 2

Explanation:

Valency of O is 2. X forms X2O. Hence valency of X is 1. Thus it has 1 electron for outermost shell. Hence it belongs to group IA. When X reacts with chlorine it forms XCl.