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.
Ecstasy. Ecstasy is a semi synthetic member of the amphetamine class of psychoactive drugs, a subclass of the phenethylamines. Ecstasy also falls under many other broad categories of substances, including stimulants, psychedelics, and the empathogenic-entactogens.It is considered unusual for its tendency to produce a sense of intimacy with others and diminished feelings of fear and anxiety.ppearance: Ecstasy comes in a tablet form that is often branded as a synthetic, psychoactive drug chemically similar to the stimulant methamphetamine and the hallucinogen mescaline. Short Term Effects: Effects start about a half hour after ingestion.