Answer #1 - PF3
Answer #2 - PF5
This second answer uses an expanded octet. Note that there are 10 electrons in the valence shell. This is very common with many 10, 12, 14 and more examples known. The next tutorial deals with these as well as substances with 6 elecrons in their valence shell (called a deficient octet)
Go to more problems which obey the octet rule.
Go to the tutorial on expanded and deficient octets.
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