   Chapter 16, Problem 28P

Chapter
Section
Textbook Problem

In the classical model of a hydrogen atom, an electron orbits a proton with a kinetic energy of +13.6 eV and an electric potential energy of −27.2 eV. (a) Use the kinetic energy to calculate the classical orbital speed. (b) Use the electric potential energy to calculate the classical orbital radius.

(a)

To determine
The classical orbital speed.

Explanation

Given info: The kinetic energy of electron is 13.6 eV.

Explanation:

Formula to calculate the speed is,

v=2Ekme

• Ek is the kinetic energy.
• me is the mass of electron.

Substitute 13.6 eV for Ek and 9.11×1031kg for me .

v=2(13.6eV)9

(b)

To determine
The classical orbital radius.

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