CH 304K 1st Edition Lecture 10 Outline of Last Lecture I. The Ozone LayerOutline of Current Lecture II. Structure of the atomIII. Representing Atom StructureIV. Electromagnetic StructureCurrent LectureStructure of the atom- Proton: 1+ charge- Electron: 1- charge- Neutron: 0 charge (neutral)- Thompson proposed “plum pudding” model where protons and electrons were randomly mixed and distributed in the atom- Rutherford discovered that the atom had a very small, dense nucleus with his gold foil alpha particle scattering experiment- The nucleus of an atom is a TINY portion of the atom; the diameter of the atom is approximately 10,000-100,000 times greater than the nucleusRepresenting Atomic Structure- Atomic number= the number of protons in the element- Atomic mass number= the number of protons and neutronsElectromagnetic Spectrum- Light is a form of energy called Electromagnetic Radiation- Our eyes only see a tiny portion of the EM spectrumThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- We can feel some infrared radiation- Travels as waves- Speed of light: c = 3 x 108 m/s- Shorter wavelengths means a higher frequency and therefore more energy- Longer wavelengths means a lower frequency and therefore less
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