Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 8 - Exercises - Page 376: 49


a. $V$ or $As$ b. Selenium c. Vanadium d. Krypton

Work Step by Step

a. In the $4^{th}$ period , $[Ar]4s^{2}3d^{3}$ or $[Ar]4s^{2}3d^{10}4p^{3}$ configurations will have 5 valence electrons. These are configurations of $V$ and $As$ b. In the $4^{th}$ period , $[Ar]4s^{2}3d^{10}4p^{4}$ configuration is of Selenium c. In the $4^{th}$ period , $[Ar]4s^{2}3d^{3}$ configuration is of Vanadium d. In the $4^{th}$ period , $[Ar]4s^{2}3d^{10}4p^{6}$ configuration is of a complete outer shell. This is of krypton.
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