General Chemistry 10th Edition

Published by Cengage Learning
ISBN 10: 1-28505-137-8
ISBN 13: 978-1-28505-137-6

Chapter 2 - Atoms, Molecules, and Ions - Questions and Problems - Page 86: 2.128

Answer

Please see the work below.

Work Step by Step

Let us suppose that $X$ be the number of protons so $1.30x$ is the no. of neutrons. Mass number is 62, hence $x+1.30x=85=2.30x$ $\implies x=36.95$ This shows that the element is Rubidium and the ion has $+1$ charge and there are 36 electrons.
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