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.
Severe hearing loss - People with severe hearing loss depend on powerful hearing aid. However, they often rely on lip-reading even when they are using hearing aids. The most quiet sounds heard by people with severe hearing loss with their better ear are between 70 and 95 dB HL.