Valency and Element X:
Element X has a valency of 3, which means it can form compounds with other elements by either gaining or losing 3 electrons.

Chloride of Element X:
When element X reacts with chlorine, it will form a compound known as XCl3. Since element X has a valency of 3, it will combine with three chloride ions (Cl-) to achieve a stable electronic configuration. Therefore, the chloride of element X is XCl3.

Sulphide of Element X:
Similarly, when element X reacts with sulphur, it will form a compound called XS3. Element X will combine with three sulphide ions (S2-) to balance the charge and achieve stability. Hence, the sulphide of element X is XS3.

In summary, the chloride of element X is XCl3 and the sulphide of element X is XS3. These compounds are formed based on the valency of element X, which determines the number of electrons it can gain or lose in chemical reactions.

XCl3 chloride and XS is sulphide