Why do atoms want to complete their shells?

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Discussion Overview

The discussion centers around the reasons why atoms seek to complete their outer electron shells, exploring the underlying physical mechanisms that drive this behavior. It touches on concepts from chemistry, particularly regarding atomic bonding and electron configurations.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant notes that hydrogen has one electron and seeks to complete its outer shell with two electrons, leading to bond formation.
  • Another participant mentions that chlorine has seven electrons in its outer shell and desires eight, which also drives it to bond with other atoms.
  • It is suggested that inert gases have complete outer shells and therefore show little interest in forming bonds.
  • A question is raised about the physical mechanism behind this desire to bond, particularly regarding the role of electron spin and its implications for atomic neutrality.
  • Several participants emphasize the concept of lowest energy configuration as a key factor in understanding atomic bonding.
  • There are repeated requests for guidance and acknowledgment of the abundance of online resources related to the topic.

Areas of Agreement / Disagreement

Participants express varying degrees of understanding and interest in the topic, with some agreeing on the importance of lowest energy configurations while others seek further clarification on the underlying mechanisms. The discussion does not reach a consensus on the specific physical phenomena involved.

Contextual Notes

The discussion highlights a lack of clarity regarding the physical mechanisms that drive atoms to bond, particularly concerning electron spin and atomic neutrality. There are also references to online resources that may provide additional information, but no specific conclusions are drawn.

Who May Find This Useful

This discussion may be useful for individuals interested in chemistry, particularly those seeking to understand atomic bonding and electron configurations at a conceptual level.

PainterGuy
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Hi,

I have a basic knowledge of chemistry from high school days.

I remember once being told that a neutral hydrogen has one electron in its shell but it wants to complete its outer shell by having two electrons, and this makes hydrogen atom to create bonds with other atoms.

Likewise, a neutral atom such as that of chlorine has seven electrons in its outer shell but it likes to have eight electrons and therefore a chlorine atom loves to make bonds with other atoms.

The atoms of inert gases have complete outer shells therefore they have least interest making any bonds.

Those atoms don't have a desire of their own and behind that "it wants" and "it likes" there should be some physical phenomenon or mechanism which pushes the atoms in that direction of making bonds. Otherwise, I think, a neutral atom should be more happy.

Question:
What is that physical mechanism? Does that mechanism have something to do with having such number of electrons in the outer shell where the spin of one electron counters the opposite spin of another electron?

If it's really about the spin, then what is so bad about the spin of a single electron that it should be cancelled by an opposing spin of another electron even though the atom will no longer be neutral? For example, when a hydrogen has two electrons in its shell, the atom is no longer neutral.

Could you please guide me?
 
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I think covalent bond is the key word for you to understand the issue.
 
To keep things simple, think in terms of the lowest energy configuration.
 
PainterGuy said:
Could you please guide me?
There must be so much about this online. At all levels of detail.
 
PeroK said:
There must be so much about this online. At all levels of detail.

Yes, they mostly answer in terms of complete shells. Anyway, I will keep looking.
 
As it was already said: think in terms of the lowest energy configuration.
 
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