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Octet

Posted: Wed Jul 31, 2019 2:01 am
by duenezjuleny1D
how does an atom or molecule not follow the octet rules? how do you explain them?

Re: Octet

Posted: Wed Jul 31, 2019 8:28 am
by Chem_Mod
The octet rule is violated in compounds with more than eight electrons assigned to their valence shell. These are called expanded valence shell molecules. Such compounds are formed only by central atoms in the third row of the periodic table and beyond that have empty d orbitals in their valence shells that can participate in covalent bonding (includes phosphorus, sulfur, and chlorine).

Re: Octet

Posted: Mon Oct 21, 2019 10:11 pm
by Hannah_4G
Chem_Mod wrote:The octet rule is violated in compounds with more than eight electrons assigned to their valence shell. These are called expanded valence shell molecules. Such compounds are formed only by central atoms in the third row of the periodic table and beyond that have empty d orbitals in their valence shells that can participate in covalent bonding (includes phosphorus, sulfur, and chlorine).

Would BrF3 fall into an expanded valence shell? And how would that be structured?