دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the quality of being either negative or positive;in magnetism. the north or south pole of a magnet.

n: in nature, molecule sconsist of group of atoms bonded together. Overall the electrial charge is zero beause the number of protons and electrons balance. However some covalent molecules may express polarity, where the electrical charges, though balanceing