Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 2 Atoms, Molecules, and Ions - Study Questions: 112

Answer

38 electrons. Lose 2 electrons. Kr. It would have 36 electrons when it was charged.

Work Step by Step

According to the periodic table and $Z=e^-$ for neutral atoms, there are 38 electrons. Since Sr is from group 2A, it would lose two electrons, which would make its electronic structure similar to that of Krypton (Kr), the noble gas from the previous period.
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