Which Elements Exist as Diatomic Molecules?

In summary, halogens and inert gases travel in pairs, while elements like sulfur exist in larger molecules such as S8. This is because these elements have a tendency to bond together in pairs or larger groups, rather than existing as single atoms. Other elements that also exist in pairs or larger groups include phosphorous (P4), arsenic (As4), and cesium (Cs).
  • #1
Muzzae
8
0
Which elements "travel in pairs"?

This isn't exactly "homework help", just something that's been on my mind for a while. I know that when writing chlorine, oxygen and hydrogen by itself, you need to add a two. Why is this so? And also, what other elements "travel in pairs"?
 
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  • #2
the halogen and the inert gases "travel in pairs." bromine, iodine...Xe...
 
  • #3
Aha...answer found here. This thread can be closed :)
 
  • #4
Consider also:

phosphorous- P4
arsenic- As4
sulfur- S8 and others
 
  • #5
Inert (noble) gases are monatomic.

H, N, O, and halogens F, Cl, Br, I, At form pairs, or diatomic molecules.

Cesium gave forms in which molecules have quadruples or octuples.
 
  • #6
Question related to this...

Halogen and such gases exists in diatomic - we write Cl2, I2 etc.
But sulphur exist in S8, why we write S in our equations?
then when do we write as element (in S) and when we write in molecule as in Cl2?

thanks
 

FAQ: Which Elements Exist as Diatomic Molecules?

What are paired elements?

Paired elements are two elements that have similar chemical properties and are typically found together in nature. These elements are also known as "twin elements" or "chemical siblings".

Which elements commonly travel in pairs?

The most common elements that travel in pairs are alkali metals and halogens, such as sodium and chlorine, or potassium and bromine. These elements have similar outer electron configurations and tend to form ionic bonds with each other.

What is the significance of paired elements?

The significance of paired elements lies in their similar chemical properties and tendency to form stable compounds with each other. This allows scientists to predict the behavior of these elements and their compounds, making it easier to study and utilize them.

How do paired elements differ from isotopes?

Paired elements are different elements that have similar properties and are typically found together, while isotopes are different forms of the same element with varying numbers of neutrons in their nuclei. Paired elements have different atomic numbers, while isotopes have the same atomic number.

Are there exceptions to the rule of paired elements?

Yes, there are exceptions to the rule of paired elements. While most elements tend to form compounds with their "twins", there are some elements that do not have any paired elements. For example, helium and neon do not have any chemical siblings.

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