Enter the formula for the compound formed between potassium and sulfur.

K₂S

Explanation:

A chemical formula is a formula showing the symbols of elements present in a compound.

It shows the symbols of the elements in a compound and the number of atoms of each element in the compound.

To write the formula of the compound we need to;

First, identify the elements in the compounds and their symbolsIn this case, the symbols of potassium and sulfur are K and S respectively.Secondly, we need to know their valency.Potassium has a valency of 1 since it reacts by losing one electron to attain stability while sulfur has a valence of 2 since it reacts by gaining two electrons to attain an octet configuration.So, we have K¹S²Thirdly, we write the formula with each element taking the valency of the other element as a subscript.We get our formula as K₂S.