I have homework in which it asks "Describe the difference between elements, mixtures and compounds. (I have done the first sentence as it was fairly easy. Next is the part I don't understand) You need to draw their chemical formulae (for example KCl for potassium chloride) and structural formulae (i.e. the chemical diagram for potassium chloride)". I just don't get what it means in the fact that, I think it wants me to find the structural and chemical formulae for an element, mixture and compound however i just don't know where to begin. I have been on this question for hours and I was wondering if i could get help