Which Elements

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Reese - Dis 1G
Posts: 31
Joined: Fri Sep 28, 2018 12:15 am

Which Elements

Postby Reese - Dis 1G » Sat Dec 01, 2018 3:35 pm

Which elements can have an octet exception?

Katie Sy 1L
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: Which Elements

Postby Katie Sy 1L » Sat Dec 01, 2018 3:39 pm

Sulfur, phosphorus, silicon, and chlorine are some common ones and boron and aluminum can form compounds in which they have six valence electrons

Faith Fredlund 1H
Posts: 68
Joined: Fri Sep 28, 2018 12:18 am

Re: Which Elements

Postby Faith Fredlund 1H » Sat Dec 01, 2018 4:56 pm

Elements with an octet expansion exception begin in the 3rd row because in this row n=3, therefore l=0,1,2 : meaning that electrons of an element in the 3rd row can lie in a l=0 s orbital, a l=1 p orbital, or a l=2 d orbital. Because the 3rd row elements have access to bonding with d-orbitals, they are not limited to the octet rule established by the only eight electrons that can occupy the s and p orbitals. Conversely, there are some elements that are more stable when their octet is only partially filled, with the most common being Boron, which is stable with only three bonds.

Esther Lee 4H
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: Which Elements

Postby Esther Lee 4H » Sun Dec 02, 2018 11:55 am

605151566 wrote:Elements with an octet expansion exception begin in the 3rd row because in this row n=3, therefore l=0,1,2 : meaning that electrons of an element in the 3rd row can lie in a l=0 s orbital, a l=1 p orbital, or a l=2 d orbital. Because the 3rd row elements have access to bonding with d-orbitals, they are not limited to the octet rule established by the only eight electrons that can occupy the s and p orbitals. Conversely, there are some elements that are more stable when their octet is only partially filled, with the most common being Boron, which is stable with only three bonds.


thank you!!


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