【】Cl2 Lewis Structure ,Valence Electrons ,Formal Charge,Polar or Nonpolar

Cl2 Lewis Structure 

Answer:
Cl2 Lewis structure(chlorine electron dot structure) is that type of diagram where we show the total 14 valence electrons of Cl2 as dots , or dots and dashes(-).In Lewis structure,it is common that a bonding pair of two electrons can be shown by  dash(-) or dots(●●) but a lone pair of two electrons is shown by dots[●●].

Cl2 Lewis Structure

In Cl2 Lewis structure,the both chlorine atoms follow the octet rule.

In Cl2 Lewis structure,we get seven pairs of electrons.Out of seven pairs of electrons,Cl2 has one bond pair and six lone pairs of electrons.Each chlorine atom has three lone pairs of electrons.

Explanation:

Hello,today I am going to draw the Cl2 Lewis  structure  in just two steps.

  Step-1:Cl2 Valence Electrons

To draw the Cl2 Lewis  structure , we have to find out the valence electrons of chlorine first.We express valence electrons as dots in Lewis dot structure.



To get the valence electrons of chlorine,we need to look at the electronic configuration of chlorine.





Cl(17)=1s²2s²2p⁶3s²3p⁵



The highest value of principal quantum number here is n=3.


The highest value of principal quantum number ,n , indicates the valence shell and we know the electrons in valence shell is called valence shell.












The nunber of valence electrons in chlorine atom is 7.So, the number of Cl2 valence electrons is 14.




Cl --> 7

Cl2 ---->7 × 2 = 14

These 14 valence electrons have two tasks at the same time.They will connect the two atoms and satisfy the octet for the two chlorine atoms.

Cl2 Lewis Structure Setup Step-2:

First,connect two chlorine atoms.
           

Out of 14 valence electrons,we have used two.So,the remaining valence electrons are 12.

Now satisfy the octet of a chlorine atom.

Out of 12 valence electrons,we have used six.So,the remaining valence electrons are 6.

Now satisfy the octet of another chlorine atom.

Out of 6 valence electrons,we have used six.So,the remaining valence electrons are zero.

Now  look,both chlorine atoms have satisfied the octet rule.

So, Cl2 Lewis structure is given below:

Cl2 Lewis structure

Cl2 Lewis Structure:Formal Charge

Now we need to calculate the formal charge for each atom of the above Cl2  Lewis  structure.

Here is the formula for determining the formal charge of each atom in Cl2 Lewis structure.

•Formal charge =Valence electrons - Unshared Electrons - 1/2(Shared Electrons)

•Valence electrons of Cl  =7

•Shared electrons of Cl= 2

•Unshared electrons of Cl = 6

●F.C. of Cl   =7- 6 -1/2(2)

                  =7-6-1

                 =7- 7

                   =0 

So,the formal charge of each Cl in Cl2 Lewis structure is zero.

So,the best Cl2 Lewis dot structure  will be the one where most atoms will have zero formal charge.

Here is the best Lewis dot structure for Cl2 (Chlorine gas).

Some Questions and Answers

●Is Cl2 polar or nonpolar?

-Cl2 (Chlorine molecule) is not polar.There is no polar bond between two chlorine atoms as there is no electronegativity difference between them.As a result,no bond dipole is produced.So bond dipole moment is zero, and thus the net molecular  dipole moment is also zero.So, Cl2 is not polar .Cl2 is a non polar molecule.

N2 (Nitrogen molecule) is not polar.There is no polar bond between two nitrogen atoms as there is no electronegativity difference between them.As a result,no bond dipole is produced.So bond dipole moment is zero, and thus the net molecular  dipole moment is also zero.So, N2 is not polar .N2 is a non polar molecule.

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