XeCl2 Lewis Structure in 5 Steps (With Images)

So you have seen the above image by now, right?

Let me explain the above image in short.

XeCl2 lewis structure has Xenon atom (Xe) at the center which is surrounded by two Chlorine atoms (Cl). There are 2 single bonds between the Xenon atom (Xe) and each Chlorine atom (Cl). There are 3 lone pairs on the Xenon atom (Xe) as well as on both the Chlorine atoms (Cl).

If you haven’t understood anything from the above image of XeCl2 (xenon dichloride) lewis structure, then just stick with me and you will get the detailed step by step explanation on drawing a lewis structure of XeCl2.

So let’s move to the steps of drawing the lewis structure of XeCl2.

Steps of drawing XeCl2 lewis structure

Step 1: Find the total valence electrons in XeCl2 molecule

In order to find the total valence electrons in XeCl2 (xenon dichloride) molecule, first of all you should know the valence electrons present in xenon atom as well as chlorine atom.
(Valence electrons are the electrons that are present in the outermost orbit of any atom.)

Here, I’ll tell you how you can easily find the valence electrons of xenon as well as chlorine using a periodic table.

Total valence electrons in XeCl2 molecule

→ Valence electrons given by xenon atom:

Xenon is a group 18 element on the periodic table. ^[1] Hence the valence electrons present in xenon is 8.

You can see the 8 valence electrons present in the xenon atom as shown in the above image.

→ Valence electrons given by chlorine atom:

Chlorine is group 17 element on the periodic table. ^[2] Hence the valence electrons present in chlorine is 7.

You can see the 7 valence electrons present in the chlorine atom as shown in the above image.

Hence, 

Total valence electrons in XeCl2 molecule = valence electrons given by 1 xenon atom + valence electrons given by 2 chlorine atoms = 8 + 7(2) = 22.

Step 2: Select the central atom

For selecting the center atom, you have to remember that the atom which is less electronegative remains at the center.

Now here the given molecule is XeCl2 (xenon dichloride) and it contains xenon atom (Xe) and chlorine atoms (Cl).

You can see the electronegativity values of xenon atom (Xe) and chlorine atom (Cl) in the above periodic table.

If we compare the electronegativity values of xenon (Xe) and chlorine (Cl) then the xenon atom is less electronegative.

So here the xenon atom (Xe) is the center atom and the chlorine atoms (Cl) are the outside atoms.

Step 3: Connect each atoms by putting an electron pair between them

Now in the XeCl2 molecule, you have to put the electron pairs between the xenon atom (Xe) and chlorine atoms (Cl).

This indicates that the xenon (Xe) and chlorine (Cl) are chemically bonded with each other in a XeCl2 molecule.

Step 4: Make the outer atoms stable. Place the remaining valence electrons pair on the central atom.

Now in this step, you have to check the stability of the outer atoms.

Here in the sketch of XeCl2 molecule, you can see that the outer atoms are chlorine atoms.

These outer chlorine atoms are forming an octet and hence they are stable.

Also, in step 1 we have calculated the total number of valence electrons present in the XeCl2 molecule.

The XeCl2 molecule has a total 22 valence electrons and out of these, only 16 valence electrons are used in the above sketch.

So the number of electrons which are left = 22 – 16 = 6.

You have to put these 6 electrons on the central xenon atom in the above sketch of XeCl2 molecule.

Now let’s proceed to the next step.

Step 5: Check the stability of lewis structure

Now you have come to the final step in which you have to check the stability of lewis structure of XeCl2.

The stability of lewis structure can be checked by using a concept of formal charge.

In short, now you have to find the formal charge on xenon (Xe) atom as well as chlorine (Cl) atoms present in the XeCl2 molecule.

For calculating the formal charge, you have to use the following formula;

Formal charge = Valence electrons – (Bonding electrons)/2 – Nonbonding electrons

You can see the number of bonding electrons and nonbonding electrons for each atom of XeCl2 molecule in the image given below.

For Xenon (Xe) atom:
Valence electrons = 8 (because xenon is in group 18)
Bonding electrons = 4
Nonbonding electrons = 6

For Chlorine (Cl) atom:
Valence electron = 7 (because chlorine is in group 17)
Bonding electrons = 2
Nonbonding electrons = 6

Formal charge	=	Valence electrons	–	(Bonding electrons)/2	–	Nonbonding electrons
Xe	=	8	–	4/2	–	6	=	0
Cl	=	7	–	2/2	–	6	=	0

From the above calculations of formal charge, you can see that the xenon (Xe) atom as well as chlorine (Cl) atom has a “zero” formal charge.

This indicates that the above lewis structure of XeCl2 is stable and there is no further change in the above structure of XeCl2.

In the above lewis dot structure of XeCl2, you can also represent each bonding electron pair (:) as a single bond (|). By doing so, you will get the following lewis structure of XeCl2.

I hope you have completely understood all the above steps.

For more practice and better understanding, you can try other lewis structures listed below.

Try (or at least See) these lewis structures for better understanding:

SeF2 Lewis Structure	C2F2 Lewis Structure
XeCl4 Lewis Structure	AlBr3 Lewis Structure
AlF3 Lewis Structure	IBr Lewis Structure