Chapter 3 Quantum Theory and the Electronic Structure of Atoms

Chapter 3 Quantum Theory and the Electronic Structure of Atoms

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Chapter 3 Quantum Theory and the Electronic Structure of Atoms Energy: the capacity to do work or transfer heat Kinetic Energy Thermal Energy: associated with the random motion of atoms and molecules. Change monitored in change in temp. Potential Energy- two forms of potential energy of interest to chemists: Chemical energy: energy stored within the structural units of chemical substances Electrostatic Energy: potential energy that results from the interaction of charged particles Law of Conservation of Energy Joule: SI unit of energy. It is the amount of kinetic energy possessed by a 2kg mass moving at a speed of 1 m/s or it is 1 newton over 1 meter Wavelength (λ) Frequency ( v ) Amplitude Speed of light through vacuum (c ): 2.99792458 X 10^8 m/s Theory : visible light consists of electromagnetic waves Electromagnetic wave : has an electric field component and a magnetic component. Both components have same wavelength, frequency, and speed, but travel in perpendicular planes Proved by interference patterns Constructive interference ( in phase) = bright light Destructive interference ( out of phase ) = dim light Quantum: smallest quantity of energy that can be emitted or absorbed in the form of
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Chapter 3 Quantum Theory and the Electronic Structure of Atoms

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