Question

Draw the Lewis structure for the iodine dioxide difluoride ion, IO²F²⁻. Which statements are correct regarding its Lewis structure? (Note, all the atoms are bonded to the central I atom.) Steric Number Octet Rule Exceptions Choose at least one answer.

a. There are 34 valence electrons.
b. There are 35 valence electrons.
c. There are 36 valence electrons.
d. The steric number is 4.
e. The steric number is 5.
f. The steric number is 6.
g. The octet rule is obeyed by the O and F atoms.

Answer 1

The correct statements: are that (36 valence electrons), (steric number is 4), and (the octet rule is obeyed by the O and F atoms).

Options C, D and G are correct

Iodine (I): 7 valence electrons + 1 formal negative charge = 8 electrons

Oxygen (O): 6 valence electrons + 0 formal charge = 6 electrons (both oxygens)

Fluorine (F): 7 valence electrons + 0 formal charge = 7 electrons (both fluorines)

Total valence electrons: 8 (I) + 6 (O) + 7 (F) + 1 (-) = 22 electrons

Iodine (I) where the central atom bonded to 4 other atoms (2 oxygens and 2 fluorines). Steric number for I = 4

Oxygen (O): both oxygens obey the octet rule with 6 surrounding electrons (2 bonds and 2 lone pairs each). Both fluorines obey the octet rule with 8 surrounding electrons (1 bond and 3 lone pairs each).