1 / 11

Modern Atomic Theory

Modern Atomic Theory. The Quantum Mechanical Model. Blackbody Radiation. The Reluctant Revolutionary. Max Planck (1858-1947) Studied the profile of electromagnetic radiation emitted from a solid body heated to incandescence (black body radiation) ΔE = hν. Enter the Quanta.

terah
Download Presentation

Modern Atomic Theory

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Modern Atomic Theory The Quantum Mechanical Model

  2. Blackbody Radiation

  3. The Reluctant Revolutionary • Max Planck (1858-1947) • Studied the profile of electromagnetic radiation emitted from a solid body heated to incandescence (black body radiation) • ΔE = hν

  4. Enter the Quanta • Notice that the max shifts lower as temperature increases • The ranges are not infinite • Energy is QUANTIZED • Radiation is emitted as discrete packets of energy proportional to their frequency

  5. The Patent Clerk • Albert Einstein (1879 - 1955) • Photoelectric effect • Matter exhibits particulate and wave properties • Determined amounts of energy required to remove electrons from orbits • Recall the dual nature of light (photons)

  6. The Golden Dane • Niels Bohr (1885 – 1962) • Atomic core is still + • Orbits are quantized • e- absorb E, excite to higher n levels, return to ground state and emit the excess E as a photon of light

  7. Boy Genius • Louis de Broglie (1892 – 1987) • Discovered that e- not only act as particles, but act like waves too.

  8. The Spin Doctor • Wolfgang Pauli (1900 – 1958) • Determined that the e- has one of two angular momentums “spins” • e- spin on an axis

  9. Certain Uncertainty • Werner Heisenberg (1901 – 1976) • Both momentum and velocity cannot be measured accurately • The more precisely one property is known the less precisely a second can be known

  10. A Cat in the Box • Erwin Schrödinger (1887 – 1961) • Quantum orbits are related to specific geometric properties • Wave mechanics (accurately predicted energies produced by atoms)

  11. Define the following terms… • Superposition • Entanglement

More Related