Octet rule
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Octet rule
Can someone please explain the octet rule and why the first 4 atoms on the periodic table don't have it. Thanks !
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Re: Octet rule
The octet rule is basically a guideline for bonding which says that elements (with atomic number below 20) should have 4 bonding pairs of electrons (8 e- total - the noble gas configuration).
The first 4 elements do not follow this guideline as they do not need 8 e- to reach a noble gas configuration to feel stable, they can simply have 2 e- to reach the configuration of He.
But be wary, there are exceptions to this guideline that were discussed in class: expanded octet, B and Al, and radicals.
The first 4 elements do not follow this guideline as they do not need 8 e- to reach a noble gas configuration to feel stable, they can simply have 2 e- to reach the configuration of He.
But be wary, there are exceptions to this guideline that were discussed in class: expanded octet, B and Al, and radicals.
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- Posts: 76
- Joined: Fri Sep 28, 2018 12:16 am
Re: Octet rule
Te Jung Yang 1G wrote:The octet rule is basically a guideline for bonding which says that elements (with atomic number below 20) should have 4 bonding pairs of electrons (8 e- total - the noble gas configuration).
The first 4 elements do not follow this guideline as they do not need 8 e- to reach a noble gas configuration to feel stable, they can simply have 2 e- to reach the configuration of He.
But be wary, there are exceptions to this guideline that were discussed in class: expanded octet, B and Al, and radicals.
Thanks!
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