Give the formula for the ionic compound that forms between Potassium and Sulfide. a. K2S2
b. K2S
c. KS
d. KS2

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .