Question

total number of lone pair of electron I3^- ion is

Answer 1

I3- - Triiodide ion. I has 7 valence electrons plus 1 for each I-I single bond and one for the charge.
Total = 10 electrons, five pairs.
Structure based on a trigonal bipyramid, the three lone pairs go equatorial, so the.




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Answer 2

Answer : The total number of lone pair of electrons in $I^-_3$ ion is 9.

Explanation :

We have to calculate the lone pair of electrons by the Lewis-dot structure.

Lewis dot structure : It is defined as the structure in which the valence electrons of an atom is shown as dots.

The steps involved in the Lewis dot structure of $I^-_3$ are :

First we have to determine the total number of valence electron in $I^-_3$.

Number of valence electrons in I = 7

The charge on I is (-1). So, we add 1 electrons.

Total number of valence electrons = 3(7) + 1 = 22 electrons

Total electrons pair = 11

Total bonding pair of electrons = 2

Total lone pair of electrons = 11 - 2 = 9

The image is shown below.