Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 8 - Questions and Problems - Page 363: 8.28

Answer

1 lone pairs, 2 lone pairs, 0 lone pair.

Work Step by Step

Br has 7 valence electrons, and when one of its electrons is bonded, it has 3 lone pairs. H2S has 2 lone pairs because sulfur has 6 electrons, and when 2 of it is bonded, it has a remaining of 2 electron pairs. CH4 has no lone pairs because all the electors on carbon is bonded to the 4 hydrogens.
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