Octet rule

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Adrienne B 1J
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Octet rule

Postby Adrienne B 1J » Sat May 19, 2018 2:53 pm

What is the octet rule?

Dennisse Diaz 1D
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Re: Octet rule

Postby Dennisse Diaz 1D » Sat May 19, 2018 2:59 pm

The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electron configuration as a noble gas.

Cameron Smith 1I
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Re: Octet rule

Postby Cameron Smith 1I » Sat May 19, 2018 7:01 pm

Elements from the 3rd period and below can break the octet rule and acquire more than 8 valence electrons (an octet) due to the presence of the d orbital.

AnnaYan_1l
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Re: Octet rule

Postby AnnaYan_1l » Sat May 19, 2018 9:16 pm

As the people above have stated, the octet rule is basically a rule in which atoms combine with other atoms so that they have 8 valence electrons. However, there are exceptions to this rule, so keep this in mind.

Allen Chen 1J
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Re: Octet rule

Postby Allen Chen 1J » Sat May 19, 2018 10:25 pm

The octet rule is the general rule where elements before the d orbital want 8 electrons

004985802
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Re: Octet rule

Postby 004985802 » Sun May 20, 2018 2:16 pm

that atoms prefer a more stable state of 8 valence electrons (and they lose or gain electrons through bonding or ionization to have full valence shells)

Jesus A Cuevas - 1E
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Re: Octet rule

Postby Jesus A Cuevas - 1E » Sun May 20, 2018 2:44 pm

The octet rule simply states that 3rd period elements will either want to accept or give away (e-)'s to obtain a full octet, to have an (e-) configuration of a noble gas.

Alondra Juarez section 1E
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Re: Octet rule

Postby Alondra Juarez section 1E » Sun May 20, 2018 3:54 pm

The octet rule is when main group elements combine in a certain way so that each atom has eight electrons in its valence shell.

madisonhanson1b
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Re: Octet rule

Postby madisonhanson1b » Sun May 20, 2018 4:50 pm

I know elements can break the octet rule, but up to how many extra electrons can they have?

SammiOrsini_1B
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Re: Octet rule

Postby SammiOrsini_1B » Sun May 20, 2018 5:27 pm

How do you know when atoms can break the octet rule? or which atoms can break the octet rule?

nelquosey
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Re: Octet rule

Postby nelquosey » Sun May 20, 2018 5:34 pm

SammiOrsini_1B wrote:How do you know when atoms can break the octet rule? or which atoms can break the octet rule?

These are just exceptions that need to be memorized, but I don't think we need to worry too much about them. just be familiar in general with the idea that there are atoms that do not agree with the octet rule, and maybe be familiar with what they are.

QuincyH1G
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Re: Octet rule

Postby QuincyH1G » Sun May 20, 2018 6:29 pm

When we do break the octet rule, is there any specific way to add electrons?

Amanda 1A
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Re: Octet rule

Postby Amanda 1A » Sun May 20, 2018 8:35 pm

you can break the octet rule with atoms that are lower than the 3rd row on the periodic table since they have additional d orbitals as well.

juliaschreib1A
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Re: Octet rule

Postby juliaschreib1A » Sun May 20, 2018 11:45 pm

The octet rule is when atoms are most stable with a full set of electrons (8). There are many exceptions to this rule that simply just need to be memorized. Therefore, when drawing lewis dot diagrams most times, each element needs to find it's most stable state with 8 electrons each, either shared or not.

Heung Ching Chia 1E
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Re: Octet rule

Postby Heung Ching Chia 1E » Sun May 20, 2018 11:47 pm

Q: When we do break the octet rule, is there any specific way to add electrons?

A: After the third period/row, the octet rule can be broken because of the electrons in the d-block. There is no specific way to add electrons I believe. It is just counting the number of total valence electrons and trying to fit those electrons in a logical way onto the molecule while taking into account the elements' group number/number of valence electrons.

Elana Weingord 1C
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Re: Octet rule

Postby Elana Weingord 1C » Mon May 21, 2018 5:06 pm

What are the exceptions to the octet rule?

KristinaNguyen_1A
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Re: Octet rule

Postby KristinaNguyen_1A » Mon May 21, 2018 8:15 pm

SammiOrsini_1B wrote:How do you know when atoms can break the octet rule? or which atoms can break the octet rule?


Elements from the 3rd period and below can have more than 8 valence electrons because you have the D orbital added to it.
Some other exceptions are Boron and Aluminum which can have 6 valence electrons and Hydrogen and Lithium which can have 2 valence electrons.

Erin Li 1K
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Re: Octet rule

Postby Erin Li 1K » Wed May 23, 2018 1:26 am

atoms are most stable when they have eight electrons. However, there are exceptions to this like hydrogen which only has one electron.


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