Answer
+3
Work Step by Step
$PF_3$
From the periodic table, $F$ is -1. Since the overall charge must be 0 then we have:
$P+3(F)=0$
$P+3(-1)+0$
$P-3=0$
$P=3$
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 4 - Reactions in Aqueous Solution - Exercises - Page 159: 4.49e
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