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Chapter 3.6-

Chapter 3.6-. Chad Stessman. Bohr Model . Niels Bohr- electrons exist in energy levels Can only be of certain energy-quantized If electron moves to higher energy level requires quanta of energy. Ground state- lowest possible energy level Electrons prefer to stay in ground state

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Chapter 3.6-

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  1. Chapter 3.6- Chad Stessman

  2. Bohr Model • Niels Bohr- electrons exist in energy levels • Can only be of certain energy-quantized • If electron moves to higher energy level requires quanta of energy.

  3. Ground state- lowest possible energy level • Electrons prefer to stay in ground state • Excited state- when energy excites electron to a higher energy level.

  4. Relaxation • When energy no longer present relaxes to lower energy state • Releases energy equal to energy difference

  5. Certain levels can only handle a certain number of electrons • Indicated by formula 2n • 2, 8, 18

  6. Building atoms

  7. Quantum Mechanical Atom • Bohr suggested electron are particle like • Actually they exist as waves

  8. Schrodinger Equation • German physicist Erwin Schrodinger described electrons as waves and determined probability of finding them in a region of space.

  9. S orbital- spherical shape contains 2 electrons max • P orbital- two lobes, one node, three of these contain 6 electrons max • D orbital- two nodes, five of these, 10 electrons max • F orbital- three nodes, seven of these, 14 electrons max

  10. Shells broken into sub shells • 1 –s • 2 – 2s, 2p • 3 – 3s, 3p, 3d • 4 – 4s, 4p, 4d, 4f

  11. Electron configuration of Periodic Table • Vertical columns- groups or families, similar physical properties • Horizontal rows-periods, properties vary across periods.

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