What are the limitations of octet rule reply fast asap!!!?????????

1.	What are the limitations of octet rule reply fast asap!!!?????????
Answer» How can u type such a long answer??<br>a) Two Electrons: Hydrogen and helium have only one electron shell. The first shell has only one s orbital and no p orbital, so it holds only two electrons. Therefore, these elements are most stable when they have two electronsb) Expanded Octet: The covalently bonded compounds like PCl5, ClF3, ICl3, SF6, IF7, OsF8 and OsO4 have expanded octets in them. The central atoms in these molecules have more than eight electrons in their outermost shell. c) Less Than an Octet: In BeCl2, the central atom Be has only 4 electrons and in BF3, boron shares its three electrons with three fluorine atoms. The fluorines follow the octet rule, but boron has only six electrons.d) Odd Numbers: Nitrogen have an odd number of electrons and will form somewhat stable compounds. Nitric oxide has the formula NO. No matter how electrons are shared between the nitrogen and oxygen atoms, there is no way for nitrogen to have an octet. It will have seven electrons instead.

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