What happens to the Atomic Number of Elements as you move Left to Right, Up to down on the Periodic Table?

30litre of li2o is 1.0002mole approximately 1 mole

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).