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Physics / College Physics 1 / Chapter 2 / Problem 15

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

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The planetary model of the atom pictures electrons

Chapter 2, Problem 15

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QUESTION:

Problem 15PE

The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model you can view hydrogen, the simplest atom, as having a single electron in a circular orbit 1.06×10−10 m in diameter. (a) If the average speed of the electron in this orbit is known to be 2.20×106 m/s , calculate the number of revolutions per second it makes about the nucleus. (b) What is the electron’s average velocity?

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QUESTION:

Problem 15PE

The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model you can view hydrogen, the simplest atom, as having a single electron in a circular orbit 1.06×10−10 m in diameter. (a) If the average speed of the electron in this orbit is known to be 2.20×106 m/s , calculate the number of revolutions per second it makes about the nucleus. (b) What is the electron’s average velocity?

ANSWER:

Step 1

The diameter of the orbit and the average speed of the electron is given. From this given data calculate the number of revolution the electron does in one second.

Then also calculate the average velocity of the electron.

(a)

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