Answer
+6
Work Step by Step
$O:[He]2s^{2}2p^{4}$
The atomic number for helium is 2, which means there are $S=2$ electrons.
$Z_{eff}$$=$$Z-S$$=8-2$$=+6$
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 8 - Sections 8.1-8.9 - Exercises - Problems by Topic - Page 376: 59c
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