Question 8.13: Draw the Lewis structure of arsenic pentafluoride (AsF5).

Draw the Lewis structure of arsenic pentafluoride (AsF₅).

Strategy Follow the steps for drawing Lewis structures. The skeletal structure already has more than an octet around the As atom.

Setup There are 40 total valence electrons [five from As (Group 5A) and seven from each of the five F atoms (Group 7A)]. We subtract 10 electrons to account for the five bonds in the skeleton, leaving 30 to be distributed. Next, place three lone pairs on each F atom, thereby completing all their octets and using up all the electrons.

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