Explain why some noble gases such as Xe will form compounds

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Discussion Overview

The discussion focuses on the reasons why some noble gases, particularly xenon (Xe), can form compounds while others, like neon (Ne), do not. Additionally, participants explore the orbital arrangements that contribute to bonding in ethene (H2C=CH2), specifically addressing the nature of double bonds.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • Some participants suggest that xenon has a much lower ionization energy compared to neon, making it more reactive and capable of forming compounds.
  • It is noted that elements further down the group have higher quantum numbers, leading to lower effective nuclear charge and greater polarization of their electrons, which may facilitate compound formation.
  • One participant mentions that xenon's electrons are more "available" for bonding due to its outer location and polarization characteristics.
  • Another participant asserts that compounds have been formed with neon, although this claim is contested by others who state that xenon was the first noble gas to form compounds.
  • In discussing ethene, participants describe the sp2 hybridization of carbon atoms and the formation of sigma and pi bonds through overlapping orbitals.

Areas of Agreement / Disagreement

Participants express differing views on the reactivity of noble gases, particularly regarding the formation of compounds with neon. There is no consensus on whether neon has been shown to form compounds, while there is agreement on the hybridization and bonding in ethene.

Contextual Notes

Some claims about the formation of compounds by noble gases depend on specific definitions and interpretations of reactivity. The discussion includes unresolved aspects of molecular orbital theory and the stability of noble gas compounds.

Who May Find This Useful

This discussion may be useful for students studying chemistry, particularly those interested in the properties of noble gases and the nature of chemical bonding in organic compounds.

gotzmlk
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sorry but this si really hard for me i don't understand these 2 question.

Explain why some noble gases such as Xe will form compounds and some such as Ne will not?


What kinds of orbital arrangemenets contribute to the bonding in ethene

H2C = CH2

thats a double bond

i tried and i don't understand.
 
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trigonal planar

All atoms will be on a flat plane with the Hydrogens coming off at a 120 angle.

Nautica
 
Xenon has a much lower ionization energy than neon, by a difference of a 1000 or so kJ/mol. In other words it will take less energy to strip an electron off xenon and make it reactive compared to neon. It still takes a lot of energy though.

In ethene, the carbons are sp2 hybridized.
/:up spin
\:down spin

CH2=CH2
2s _/\_
2p _/_ _/_ __

make
sp2 _/\_ _/_ _/_
and the leftover 2p __
with two spots for the two hydrogens and an empty 2p orbital that overlaps with the adjacent carbons empty 2p to make the pi bond. I hope that wasn't too confusing. Do you have a textbook that you use with your class?
 
Last edited:
I'm pretty sure they've formed compounds with neon. In fact I think that was the first noble gas they've got to form compounds.
 
Uh, nope --- Xe first, then Kr. I s'pose radon's the most reactive of the group, but the 4 day half-life takes all the fun out of playing with it.
 
Elements farther down the column have higher quantum numbers and as a result the valence electrons have less effective nuclear charge; thus low ionization energy and most importantly of all they are able to be polarized. An example of this is their ability to more easily form van der wal bonds. Simply said, Xe's electrons are more "available" due to its outer location as well as its polarization characteristics.
Remember though that these compounds are most likely induced-ionic or induced dipole bonds. The stability of nobles gases and thus their instabilty as compounds can be explained through molecular orbital theory.

Hybridized SP2 atomic orbitals form sigma molecular orbitals with SP2 and S orbitals, overlapping Pz orbitals forms the pi shaped molecular orbital.

Hope this helps.
 

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