Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 29 - Molecules and Solids - Problems - Page 854: 1

Answer

5.1 eV

Work Step by Step

Calculate the binding energy; It is the negative of the electrostatic potential energy. “k” is the Coulomb constant, and "e" is the elementary charge. Binding energy = -PE = $-k\frac{q_1q_2}{r}=-k\frac{(1.0e)(-1.0e)}{r}$ $$=k\frac{(1.60\times10^{-19}C)^2}{0.28\times10^{-9}m}=8.2\times10^{-19}J$$ This is about 5.1 eV.
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