CHEM 1300 Chapter Notes - Chapter 4 : Spectra Energy, Bohr Model, Absorption Spectroscopy

• School: University of Manitoba
• Department: Chemistry
• Course: CHEM 1300
• Professor: Elena Smirnova

Document Summary

6. possess mass contain positive nuclei contain electrons occupy volume attract one another combine to form molecules. 4. 2 - characteristics of light: the interaction between electromagnetic radiation and atoms gives us useful information, what is commonly described as light is just a small fraction of all electromagnetic radiation, classically, light is described as a wave. Thus light has: wavelength, frequency, amplitude (height of the waves) Amplitude and intensity: the brighter a light is the more intense it is and the higher the amplitude. Light is also a particle: light is quantized, the individual packet of light. Quanta are called photons: a photon with enough energy can collide with an. Atoms and eject an electron: plancks equation is used to calculate that energy. Atomic spectra : absorption: when the photon has energy that matches the gap between ground and excited state. > absorption by atom: therefore we can say that the change of energy of an atoms = energy.