Answer
Please see the work below.
Work Step by Step
We know that for the Eu atom to be the number of electrons should be equal the number of protons. Hence, the neutral euopium atom has 63 electrons.
General Chemistry 10th Edition
by Ebbing, Darrell; Gammon, Steven D.
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 85: 2.107
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