1. AP Chemistry Chapter 7 Introduction Presentation
Atomic Structure and Periodicity

2. 7.1 Electromagnetic Radiation

4. Notes ROYGBIV makes up our visible spectrum
The visible portion of the spectrum falls in the middle of the various types of wavelengths
We see visible light because of the chemical reactions that take place within our Retina
All types of electromagnetic radiation travel at the speed of light
Short waves have a high frequency
Long Waves will have a lower frequency

5. Properties of Electromagnetic Waves
1. Wavelength – Symbolized with (l)
It’s the distance between two consecutive peaks or troughs in a wave measurement
Measured in meters
2. Frequency – Symbolized with the greek letter Nu
# of waves that pass a give point per second
Measured in Hertz (hz) which is (sec-1)

6. Properties 3. Speed (C) Measured in meters per second
Constant value of 3.00 x 108 m/s

7. 7.3 The Atomic Spectrum of hydrogen
1. Continuous Spectrum – occurs when white light passes through a prism
Contains all the visible wavelengths of light
An individual elements spectrum will not contain all the visible wavelengths of light
BLS corresponds to the energy of the electrons of the element
IF an electron is excited and jumps we say its Quantized (small pocket of energy)
Spectrum is produced when excited electrons come back to the ground state