Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 7 - Atomic Structure and Periodicity - Review Questions: 1

Answer

Wavelength: the distance between two consecutive peaks or troughs in a wave. Frequency: the number of waves (cycles) per second that pass a given point in space. Photon Energy: the amount of energy carried by a photon Speed of Travel: speed of light (2.998*10$^8$ m/s) Increasing Wavelength: gamma rays, ultraviolet, visible light, microwaves Increasing Frequency: microwaves, visible light, ultraviolet, gamma rays Increasing Photon Energy: microwaves, visible light, ultraviolet, gamma rays All types of EMR have the same speed of travel

Work Step by Step

The definitions were provided in the text. By looking at a diagram of the electromagnetic spectrum, you can see that the order of these types of EMR by increasing wavelength is gamma rays, ultraviolet, visible light, and finally microwaves. Because frequency and photon energy are both inversely proportional to wavelength, the order is opposite that of wavelength. Due to the fact that the speed of travel is constant no matter the wavelength, all types of EMR have the same speed of travel.
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