Answer
Europium; Eu
Work Step by Step
An element is defined by the number of protons it has. Thus, we find the element with an atomic number of 63, which is Europium. The symbol is Eu.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 2 - Chemical Compounds - Summary Problem - Part I - Page 88: a
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