Chemistry 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078021510
ISBN 13: 978-0-07802-151-0

Chapter 2 - Atoms, Molecules, and Ions - Questions & Problems - Page 68: 2.27

Answer

Please see the work below.

Work Step by Step

We know that atom has a nucleus which has protons and zero or more neutrons and same number of electrons. The number of protons and electrons in atom must be equal otherwise the atom becomes ion. A molecule is made of two or more atoms e.g $H_2O$.
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