the Octet rule

[Peter Nguyen 2I]

When forming bonds, do atoms always try to follow the octet rule? Are there exceptions to this rule/guideline?

[timothy_ho_4B]

As far as I know, most atoms should follow the octet rule. There are a few atoms (mostly unstable ones) that bond in
very odd formations, but I'm sure we will go over them in class or they won't be important for the course.

[RandallNeeDis3K]

Yes they always look for the full octet.

[Rhea Churi 4K]

Usually, most atoms try to follow the octet rule. However, there are cases where 1) molecules have an odd number of electrons
(ex. NO), 2) two few valence electrons result in an incomplete octet usually common w boron, aluminum, and beryllium (ex. BH3), or 3) expanded octets - molecules possess more than eight valence electrons (ex. SF6).

[Daniel Lai]

Most elements try to go for a full octet or a half-filled octet.

[Jessica Castro 2H]

Most elements try to follow the Octet Rule in order to obtain a more stable state. However, as Dr. Lavelle mentioned during lecture, Hydrogen, Helium, Lithium, and Beryllium are exceptions to the Octet Rule because they don't have enough electrons in which obtaining 8 valence electrons would make them more stable (instead, they jump down to 2 valence electrons).

[alanaarchbold]

Wait what does hydrogen do in that situation?? Can you explain that better please

[Esha Harwalkar 3F]

Hydrogen only holds 1 electron in the outermost shell (only 1 valence electron), so if drawing a lewis dot structure, it will only have a single bond to another atom and no more dots around it.

[shaunajava2e]

all elements follow the octet rule except hydrogen, helium, lithium, and beryllium which have a max of 2 valance electrons

[Srikar_Ramshetty 1K]

Most atoms do abide by the octet rule, however, there are exceptions. Hydrogen and Helium are examples of atoms that do not since they do not require are fine with having only 2 electrons. There are also examples of atoms having more than 8 electrons, such as sulfur in SF6, this is known as an expanded octet and is not a common feature in a molecule.

Hope this helps!

[Pritish Patil 1K]

Elements usually abide by the octet rule or want a half octet.

[405021651]

A half octet also makes a stable atom?

[Yiting_Gong_4L]

I think that the octet or the half octet is the most stable.

[Nick Bazett 1F]

Hydrogen becomes a cation when it loses its electron to become stable.

[Alan Chang]

Most follow the octet rule, but there are exceptions. For example there are the ones Dr. Lavelle mentioned in the lecture, and the expanded octet (I don't know if we will learn about this though).

[Isabelle_Maletz_3E]

The octet rule, which states in covalent bonds the atoms share electrons until a noble gas configuration is reached, is applied to most atoms when drawing a Lewis dot structure. However H, He, Li, and Be are all exceptions in that they do not have to form an octet because they do not have enough valence electrons to do so.

[Rebecca Park]

Most of them follow the rules, but I know that Boron is an exception to it even though it only has 6 valence electrons.

[Avery Zuelch 1D]

Yes they always follow the octet rule! Except for hydrogen. That only gets two electrons

[Luis_Yepez_1F]

The only exception to the octet rule are the first four elements, as they will try to only finish the first shell which only needs two e-.

[Danny Elias Dis 1E]

No, there are exceptions. For example, a hydrogen atom has only 1 electron, therefore the maximum number of electrons it can have is two (to fill the orbital).

[davidryan3f]

yes, there are a few exceptions. These exceptions are hydrogen, helium, lithium, beryllium. These atoms don't need to fulfill the octet rule.

[Arshia Ramesh 1G]

Are H, He, Li, Be the only four that are exceptions?