Answer
The answer is 2s.
Work Step by Step
The n number is the number of the orbital, 1 being the closest then 2 then 3. That makes the 2s orbital closer to the nucleus than the 3s orbital.
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
Published by
Prentice Hall
ISBN 10:
0321809246
ISBN 13:
978-0-32180-924-7
Chapter 7 - Sections 7.1-7.6 - Exercises - Problems by Topic - Page 331: 57
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