Octet

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Bree Perkins 1E
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Joined: Fri Apr 06, 2018 11:04 am

Octet

Postby Bree Perkins 1E » Thu May 03, 2018 3:27 pm

On Wednesday the professor briefly talked about octets, when adding or removing an electron, and I am really sorry if this is a dumb question, but what exactly does he mean by an octet? It is something I don't remember from high school chemistry.

Sollie1G
Posts: 31
Joined: Wed Nov 08, 2017 3:00 am

Re: Octet

Postby Sollie1G » Thu May 03, 2018 4:06 pm

An atom can have up to eight electrons in its outermost shell. Noble gases (Helium, Neon, Argon, etc) have full shells; or eight valence electrons, and because they have the maximum possible amount of valence electrons in their outermost shells, they are the most stable atoms. To become stable, an atom can "give up" or "take" electrons through bonding with other atoms. This is important/directly applicable to Lewis dot structures

Steven Luong 1E
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Joined: Fri Apr 06, 2018 11:03 am

Re: Octet

Postby Steven Luong 1E » Thu May 03, 2018 4:28 pm

An Octet means 8 valence electrons ==> Oct = 8, like Octopus with 8 tentacles. An atom, in order to be more stable, can have up to eight electrons in its valence shell. Noble gases (Neon, Argon, etc) have full shells of eight valence electrons each. This complete configuration allows stable gases to be the most stable atoms. The are some exceptions but we have not learned them yet. In order for atoms without an octet to gain it, they can ionically or covalently bond with other atoms to gain that octet; the type of bond that yields the lowest possible energy will be the most stable, and the atoms will be bonded as such.

Patience Olsen 1A
Posts: 28
Joined: Fri Apr 06, 2018 11:04 am

Re: Octet

Postby Patience Olsen 1A » Thu May 03, 2018 8:12 pm

Also, the eight electrons come from two electrons in the s-orbital and six electrons in the p-orbital for most atoms. Hope this clarifies things a bit.

Paywand Baghal
Posts: 32
Joined: Fri Apr 06, 2018 11:01 am

Re: Octet

Postby Paywand Baghal » Sun May 06, 2018 1:37 pm

Steven Luong 1E wrote:An Octet means 8 valence electrons ==> Oct = 8, like Octopus with 8 tentacles. An atom, in order to be more stable, can have up to eight electrons in its valence shell. Noble gases (Neon, Argon, etc) have full shells of eight valence electrons each. This complete configuration allows stable gases to be the most stable atoms. The are some exceptions but we have not learned them yet. In order for atoms without an octet to gain it, they can ionically or covalently bond with other atoms to gain that octet; the type of bond that yields the lowest possible energy will be the most stable, and the atoms will be bonded as such.


does it need 8 to be stable though?

Steven Luong 1E
Posts: 33
Joined: Fri Apr 06, 2018 11:03 am

Re: Octet

Postby Steven Luong 1E » Thu May 10, 2018 12:24 am

Paywand Baghal wrote:
Steven Luong 1E wrote:An Octet means 8 valence electrons ==> Oct = 8, like Octopus with 8 tentacles. An atom, in order to be more stable, can have up to eight electrons in its valence shell. Noble gases (Neon, Argon, etc) have full shells of eight valence electrons each. This complete configuration allows stable gases to be the most stable atoms. The are some exceptions but we have not learned them yet. In order for atoms without an octet to gain it, they can ionically or covalently bond with other atoms to gain that octet; the type of bond that yields the lowest possible energy will be the most stable, and the atoms will be bonded as such.


does it need 8 to be stable though?


For most atoms, the answer is yes. However, as we progress further in the course, there will be many exceptions, like Xenon and Boron. However, the general trend for the most stable atom is 8 electrons.

Cindy Nguyen 1L
Posts: 48
Joined: Fri Apr 06, 2018 11:04 am

Re: Octet

Postby Cindy Nguyen 1L » Thu May 10, 2018 5:43 pm

An extra detail is that the first four elements never have an octet.

NabilaNizam-1K
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

Re: Octet

Postby NabilaNizam-1K » Thu May 10, 2018 8:06 pm

Since the first four elements will not achieve octet, is there a special term for the condition when these elements achieve stable state and all the orbitals are filled?


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