This is the Cl2O Lewis structure, dichlorine
monoxide.
On the periodic table, Chlorine is in group
7 or 7, so it has 7 valence electrons, but
we have two Chlorines.
And Oxygen, group 6 or 16, 6 valence electrons;
for a total of 20 valence electrons.
Oxygen is the least electronegative so it'll
go in the middle.
Let's just put the Chlorines on either side.
Put two valence electrons between atoms to
form chemical bonds.
We'll go around the outside to complete the
octets for the Chlorines.
We have 6, 8, and 16, then back to the central
Oxygen, 18, and 20 total valence electrons.
So we've used all 20 valence electrons for
the Cl2O Lewis structure.
This Chlorine has eight valence electrons,
its outer shell is full; same here.
And the Oxygen in the center also has an octet.
So that's the Lewis structure for Cl2O.
This is Dr. B., and thanks for watching.
