 Let's go over the names of these compounds that are made from combining these two elements. So again, we just combined them and we made these things, but we don't know what they're called yet, even though we just went over that piece in lecture. So remember, the cation always comes first, and then the anion as we talked about, but it's the same in the name. So the cation comes first, and you don't actually, you don't change it, okay? So sodium stays the same, but oxygen is changed. You drop the ending and put I, so sodium oxide is the name of that compound over there. Remember, the cation doesn't change, so lithium, okay, aluminum and oxygen is going to be...