Cif3 Expanded Octet Lewis Structure. One can easily see that if the central atom p is to be joined to five cl atoms p would have 10. Xef2 1 count the total of valence 2 draw the lewis structure electrons.
Writing lewis structures with the octet rule. Most lewis structures will follow the octet rule which states that the outer valence shell is stable when it has eight electrons. Expanded octet refers to the lewis structures where the central atom ends up with more than an octet such as in pcl 5 or xef 4.
These are called expanded valence shell molecules such compounds are formed only by central atoms in the third row of the periodic table or beyond that have empty d orbitals in their valence shells that can participate in covalent bonding.
You should find that accounts for all the ve that there are too many and has an expanded octet electrons to only have 8 around around only the central atom. This example uses the steps outlined in how to draw a lewis structure to draw a lewis structure of a molecule where one atom is an exception to the octet rule. The third violation to the octet rule is found in those compounds with more than eight electrons assigned to their valence shell. This covalent compound nh 3 bf 3 shows that boron can have an octet of electrons in its valence level.
