Chemistry and Human Environment_Ridge_Date__022510

Chemistry and Human Environment_Ridge_Date__022510 - Ozone...

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Ozone II Lewis Dot Structure Gives the electron configuration of an atom or molecule Electron configuration explains: Structure of a molecule Shape of a molecule Reactivity with other atoms/molecules Interaction with light (electromagnetic radiation) Light = oscillating electric and magnetic fields Ways to specify light o λ = wavelength (length of one cycle) o ν = frequency (cycles per second) o E = energy of a photon (how much energy a molecule absorbs from light) Relationships among ν , λ and E (c = speed of light) o ν = c / λ o λ = c / ν o E ν o E 1/ λ Electromagnetic Radiation from the Sun Ozone layer – focus is on UV radiation Global climate – focus is on both UV and IR radiation If UV photons are absorbed by molecules in the atmosphere, less radiation reaches earth’s surface UV-B causes more damage than UV-A because the energy of a photon is much higher O 3 affects how much UV-B reaches earth’s surface
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As E increases and
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Chemistry and Human Environment_Ridge_Date__022510 - Ozone...

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