10-05-07%20-%20Lecture%203%20-%20FundE%20%26%20Chapter%201

10-05-07%20-%20Lecture%203%20-%20FundE%20%26%20Chapter%201...

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Counting Atoms Chemistry is a quantitative science—we need a “counting unit.” MOLE 1 mole is the amount of substance 1 mole is the amount of substance that contains as many particles that contains as many particles (atoms, molecules) as there are (atoms, molecules) as there are in 12.0 g of in 12.0 g of 12 12 C. C.
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Particles in a Mole N N A = 6.0221 x 10 = 6.0221 x 10 23 23 /mol /mol Avogadro’s Number Amadeo Avogadro 1776-1856 *There is Avogadro’s number of particles in a mole of any substance.
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CHAPTER 1 Atoms: The Quantum World
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Observing Atoms Spectroscopy: the analysis of the light emitted or absorbed by substances. Spectrum of Excited Hydrogen Gas Spectrum of Excited Hydrogen Gas
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Light is Electromagnetic Radiation Electromagnetic radiation = a wave of electric and magnetic fields ALL electromagnetic radiation travels at a speed of 3.00 x 10 8 m/s (speed of light)
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Electromagnetic Radiation
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wavelength Red light wavelength Amplitude Node Electromagnetic Radiation Electromagnetic Radiation Wave terms frequency wavelength amplitude node Blue light
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10-05-07%20-%20Lecture%203%20-%20FundE%20%26%20Chapter%201...

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