Order the elements by atomic radius, with the smallest radius at the top and largest at the bottom. = Oxygen - 90
= Scandium - 21 Sc
= Carbon - 6
= Fluorine - F
= Vanadium - 23V

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car