Multiple Choice
Which of the following statements correctly describes the Lewis dot structure of the ammonium ion (NH_4^+)?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Ions
Multiple Choice
Which of the following statements correctly describes the Lewis dot structure of the IF2O2- ion?
A
The central atom is fluorine, which is bonded to two iodine atoms and two oxygen atoms, with two lone pairs on fluorine.
B
The central atom is oxygen, which is bonded to two iodine atoms and two fluorine atoms, with no lone pairs on oxygen.
C
The central atom is iodine, which is surrounded by two fluorine atoms and two oxygen atoms, with one lone pair on iodine.
D
The central atom is iodine, which is surrounded by four fluorine atoms, with no oxygen atoms present.
Verified step by step guidance1
Identify the central atom in the IF2O2⁻ ion by considering electronegativity and typical bonding patterns. Generally, the least electronegative atom is the central atom, which in this case is iodine (I).
Determine the total number of valence electrons available for bonding. Sum the valence electrons from iodine (7), fluorine (7 each), oxygen (6 each), and add one extra electron for the negative charge.
Arrange the atoms around the central iodine atom: place the two fluorine atoms and two oxygen atoms bonded to iodine, as suggested by the formula IF2O2⁻.
Distribute the valence electrons to satisfy the octet rule for the surrounding atoms first (fluorine and oxygen), then place any remaining electrons as lone pairs on the central iodine atom.
Check the Lewis structure for formal charges and ensure the overall charge of the ion is -1. Confirm that iodine has one lone pair, consistent with the correct description.
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