Answer : The formal charge on central Cl atom is -1.
Explanation :
The given molecule is, [tex]Cl^-_3[/tex]
First we have to determine the total number of valence electrons in, [tex]Cl^-_3[/tex]
As we know, chlorine has 7 valence electrons.
Total number of valence electrons in [tex]Cl^-_3[/tex] = 3(7) + 1 = 22 electrons
Electrons used in bonding pair = 4
Electrons used as lone pair = 22 - 4 = 18
Now we have to calculate the formal charge on central Cl atom.
Formal charge on central Cl atom = 7 - (2 × 3) -2 = -1
Therefore, the formal charge on central Cl atom is -1.
The lewis-dot structure of [tex]Cl^-_3[/tex] is shown below.
The best lewis structure for [tex]\rm Cl_3^-[/tex] is linear structure. The central Cl atom has -1 formal charge.
The Chlorine belongs to group 17 with 7 valence electrons.
3 atoms of Chlorine with a negative charge will have 22 electrons.
Since Chlorine will only make one bond when not a central atom, thus have 7 electrons around it. When Cl is a central atom, it makes 2 bonds and in expanded octet has an extra electron, thus have a -1 formal charge.
Being sp hybridized the molecule adopts the linear geometry.
For more information about lewis structure, refer to the link:
https://brainly.com/question/24076507?referrer=searchResults
