Chapter27

Chapter27 - Chapter27 EarlyQuantumTheoryand ModelsoftheAtom...

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    Chapter 27 Early Quantum Theory and  Models of the Atom
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The Atom Protons – Found in the Nucleus Carry a Positive Charge Have a Mass of 1 x 10 -27  kg Neutrons – Found in the Nucleus Carry no charge Have a mass that is approximately the same as a  Proton Electrons – travel around the nucleus in  specific orbits related to their energy Carry a negative charge Have a mass of 9 x 10 -31  kg
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Light Quanta Light has a dual nature – it is made up of  packets of energy called  quanta  or  photons   which are carried on a wave. When an atom absorbs energy electrons  move from their normal or  ground state  to a  higher energy or  excited state .  To go back  to their ground state atoms give off this  excess energy as light.
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The Energy of a Photon The energy of any photon of light given  off in this way is determined by the 
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This note was uploaded on 11/18/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

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Chapter27 - Chapter27 EarlyQuantumTheoryand ModelsoftheAtom...

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