Chemistry 10th Edition

by Whitten, Kenneth W.; Davis, Raymond E.; Peck, Larry; Stanley, George G.

Published by Brooks/Cole Publishing Co.

ISBN 10: 1133610668

ISBN 13: 978-1-13361-066-3

Chapter 7 - Chemical Bonding - Exercises - Conceptual Exercises - Page 285: 86

Answer

The upper one.

Work Step by Step

The distance between two chlorine atoms is greater than the distance between two fluorine atoms, since fluorine atoms are smaller than chlorine atoms. The further the valence electrons from the kernel, the greater the bond length.

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