Chap 7 Sec 1 &amp; 2

# Chap 7 Sec 1 &amp; 2 - Chapter 7 Atomic Structure and...

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Chap 7 Sec 1 & 2 notes.doc 11/09 Page 1 Chapter 7 Atomic Structure and Periodicity Reread Chap 2.4 & 2.5 for some of the fundamental discoveries on atomic structure. 7.1 The Nature of Light Electromagnetic Radiation Radiant energy that exhibits wavelength-like behavior and travels through space at the speed of light in a vacuum Waves 1. Wavelength : distance between two peaks in a wave. 2. Frequency : number of waves per second that pass a given point in space. 3. Speed : speed of light is 2.9979 × 10 8 m/s. We will use 3.00 x 10 8 m/s. Wavelength and frequency can be . c = ν λ = c / ο r = c "

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Chap 7 Sec 1 & 2 notes.doc 11/09 Page 2 ν = frequency ( s 1 ) λ = wavelength ( m ) c = speed of light ( m s 1 ) Wavelength is also given in nm 1 nm = 10 –9 and Angstroms, Å, 1 Å = 10 –10 The frequency value of s –1 or 1/s is also called hertz ( Hz ), like kHz on the radio. Example: When green light is emitted from an Oxygen atom it has a wavelength of 558 nm.
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Chap 7 Sec 1 &amp; 2 - Chapter 7 Atomic Structure and...

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