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Octet rule

Posted: Sat May 19, 2018 2:53 pm
by Adrienne B 1J
What is the octet rule?

Re: Octet rule

Posted: Sat May 19, 2018 2:59 pm
by Dennisse Diaz 1D
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.

Re: Octet rule

Posted: Sat May 19, 2018 7:01 pm
by Cameron Smith 1I
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.

Re: Octet rule

Posted: Sat May 19, 2018 9:16 pm
by AnnaYan_1l
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.

Re: Octet rule

Posted: Sat May 19, 2018 10:25 pm
by Allen Chen 1J
The octet rule is the general rule where elements before the d orbital want 8 electrons

Re: Octet rule

Posted: Sun May 20, 2018 2:16 pm
by 004985802
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)

Re: Octet rule

Posted: Sun May 20, 2018 2:44 pm
by Jesus A Cuevas - 1E
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.

Re: Octet rule

Posted: Sun May 20, 2018 3:54 pm
by Alondra Juarez section 1E
The octet rule is when main group elements combine in a certain way so that each atom has eight electrons in its valence shell.

Re: Octet rule

Posted: Sun May 20, 2018 4:50 pm
by madisonhanson1b
I know elements can break the octet rule, but up to how many extra electrons can they have?

Re: Octet rule

Posted: Sun May 20, 2018 5:27 pm
by SammiOrsini_1B
How do you know when atoms can break the octet rule? or which atoms can break the octet rule?

Re: Octet rule

Posted: Sun May 20, 2018 5:34 pm
by nelquosey
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.

Re: Octet rule

Posted: Sun May 20, 2018 6:29 pm
by QuincyH1G
When we do break the octet rule, is there any specific way to add electrons?

Re: Octet rule

Posted: Sun May 20, 2018 8:35 pm
by Amanda 1A
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.

Re: Octet rule

Posted: Sun May 20, 2018 11:45 pm
by juliaschreib1A
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.

Re: Octet rule

Posted: Sun May 20, 2018 11:47 pm
by Heung Ching Chia 1E
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.

Re: Octet rule

Posted: Mon May 21, 2018 5:06 pm
by Elana Weingord 1C
What are the exceptions to the octet rule?

Re: Octet rule

Posted: Mon May 21, 2018 8:15 pm
by KristinaNguyen_1A
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.

Re: Octet rule

Posted: Wed May 23, 2018 1:26 am
by Erin Li 1K
atoms are most stable when they have eight electrons. However, there are exceptions to this like hydrogen which only has one electron.