Answer
Ru
Work Step by Step
Add the superscripts together in order to determine the number of electrons. This in turn will give you the atomic number of the element.
Chemistry (12th Edition)
by Wilbraham
Published by
Prentice Hall
ISBN 10:
0132525763
ISBN 13:
978-0-13252-576-3
Chapter 5 - Electrons in Atoms - 5 Assessment - Page 153: 57
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