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.
The Matrix Model - What it is. It's a proven effective, evidence-based protocol that has been used in the treatment of over 6,000 cocaine and 2,500 methamphetamine addicts. It's a ready-made intensive outpatient program (IOP) that any treatment center can implement.