Ankara Üniversitesi Açık Ders Malzemeleri

The electron was discovered in the year of 1900, and it took about twenty years for the electronic nature of the chemical bond to come into wide acceptance. Particle-based models for atomic and molecular structure soon gave way to the quantum mechanical view, in which electrons are not treated as localized, discrete particles (electrons orbiting around a nucleus), but as delocalized areas of wavelike charge, each possessing a given probability of being found in a given location near an atomic nucleus (an orbital).