Electrophilic addition to alkenes takes the following general form: nuc: = nucleophile E+ = electrophile. Electrophilic addition to alkenes starts with the pi electrons attacking an electrophile, forming a carbocation on the most stable carbon.A nucleophile then attacks the carbocation to form the product. There are many different kinds of such addition, including:lectrophilic addition to alkenes takes the following general form: nuc: = nucleophile E+ = electrophile. Electrophilic addition to alkenes starts with the pi electrons attacking an electrophile, forming a carbocation on the most stable carbon.
Selective auditory attention or selective hearing is a type of selective attention and involves the auditory system of the nervous system.
There are four types of hearing loss: 1  Conductive Hearing Loss. Hearing loss caused by something that stops sounds from getting through the outer or middle ear. 2  Sensorineural Hearing Loss. Hearing loss that occurs when there is a problem in the way the inner ear or hearing nerve works. 3  Mixed Hearing Loss.