higher chemistry polar / non polar molecules

how to tell if a molecule is polar or non polar

Are polar molecules symmetrical or non symmetrical?

they are non symmetrical - (the charges are not the same in the axes)

Polar examples

H20, NH3, CH3CL

Are non polar molecules symmetrical or non symmetrical?

They are symmetrical - (the charges are the same on the axes)

Non polar examples

PH3, CO2, CCL4

Which axes is delta negative and which is delta positive?

the higher the electronegativity, the more negative the charge.