Octet

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duenezjuleny1D
Posts: 48
Joined: Fri Sep 28, 2018 12:24 am

Octet

Postby duenezjuleny1D » Wed Jul 31, 2019 2:01 am

how does an atom or molecule not follow the octet rules? how do you explain them?

Chem_Mod
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Re: Octet

Postby Chem_Mod » Wed Jul 31, 2019 8:28 am

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).

Hannah_4G
Posts: 37
Joined: Wed Sep 18, 2019 12:22 am

Re: Octet

Postby Hannah_4G » Mon Oct 21, 2019 10:11 pm

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?


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