An old saying is that " oil and water don't mix. Explain the molecular basis for this saying

Motor oil floats on top of the water in a puddle or in an oil spill. No matter how much you mix oil and water, they always separate. Chemicals that don't mix are said to be immiscible. The reason this happens is because of the chemical nature of oil and water molecules

Explanation:

Motor oil floats on top of the water in a puddle or in an oil spill. No matter how much you mix oil and water, they always separate. Chemicals that don't mix are said to be immiscible. The reason this happens is because of the chemical nature of oil and water molecules

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."