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: 2.67

Answer

Please see the work below.

Work Step by Step

As we know that the mass number is the sum of protons and neutrons therefore there will be $65-35=30$ protons. As given that there are 28 electrons hence the element is zinc and as it has two less electrons than protons so it is an ion and is represented as $Zn^{+2}$.
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