What is formed when two liquids are combined but do not mix?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Non renewable resources like petroleum eventually

What does an electron configuration for an atom relate to the atoms placement on the periodic table