Answer
K
Work Step by Step
K has the lowest ionization energy because it is the furthest element of these that is left most and highest in the table. This means it is least electronegative and wants to give up its electrons in the valence shell.
Introductory Chemistry (5th Edition)
by Tro, Nivaldo J.
Published by
Pearson
ISBN 10:
032191029X
ISBN 13:
978-0-32191-029-5
Chapter 9 - Electrons in Atoms and the Periodic Table - Exercises - Cumulative Problems - Page 321: 101
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