For example, 63 Cu (29 protons and 34 neutrons) has a mass number of 63 and an isotopic mass in its nuclear ground state is 62.91367 u. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect:
The Electra complex is an ambiguous psychiatric concept which attempts to explain the maturation of the human female. It is said to be the female counterpart to the Oedipus complex in males.
An inferiority complex is a lack of self-worth, a doubt and uncertainty about the self, and feelings of not measuring up to standards. It is often subconscious, and is thought to drive afflicted individuals to overcompensate, resulting either in spectacular achievement or extreme asocial behavior.