Question

Please explain fully. If hand-writing response, please write clearly!! Thank you!

In the Lewis model for chemical bonding, valence electrons are represented as dots around an atom and bonds are represented by shared or transferred electrons (dots) that produce stable electron configurations.

What assumptions are made in the Lewis model?

Do you agree that these assumptions are valid? Why or why not?

Answer 1

Since the outer valence electrons participate in the lewis models , it is assumed that all the electrons either participate in bonding or remain on the atom as lone pairs.

The number of lone pairs on the atoms are determined after the completion of octet ( 8 electrons) of total bonding electrons.

But not always these assumptions are valid.

Manier times the compounds have extended octet and manier times they have the deficient octets. So not always a complete octet is maintained in the compounds.