How do you do a Lewis Diagram for a charged molecule?

In summary, the charge of a molecule can be determined by subtracting the number of valence electrons from the number of electrons needed for a neutral atom. The purpose of drawing a Lewis diagram for a charged molecule is to show the arrangement of valence electrons and predict its properties. To draw a Lewis diagram for a positively charged molecule, the total number of valence electrons is distributed to the atoms, with the remaining electrons placed on the central atom. The process for drawing a Lewis diagram for a negatively charged molecule is similar, except the central atom will have a negative charge. A molecule can have multiple possible Lewis diagrams depending on its charge, as the number of valence electrons and arrangement of atoms can vary.
  • #1
jumbogala
423
4

Homework Statement


Draw the Lewis Diagram for XeF2?

Homework Equations


The Attempt at a Solution


EDIT: Maybe this isn't a charged molecule...

How can 2 fluorines bond with Xe? Xe has no valence electrons to bond with! I guess you could do

F-Xe-F, but still, the fluorines have nowhere to bond...
 
Last edited:
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  • #2
Xe does not obey the octet rule. It has 10
..
:F:
|
:Xe::
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:F:
 
  • #3


I would like to clarify that XeF2 is not a charged molecule. It is a neutral molecule, meaning it has an equal number of protons and electrons. Therefore, a Lewis diagram for XeF2 would be drawn as follows:

Xe (with 8 dots around it) - F (with 6 dots around it) - F (with 6 dots around it)

This diagram shows the two fluorine atoms bonding with the xenon atom by sharing a pair of electrons, resulting in a stable molecule. The octet rule is satisfied for both the xenon and fluorine atoms, with each having a full outer shell of electrons.

If the molecule were to become charged, for example, by losing or gaining an electron, the Lewis diagram would be modified accordingly. For a positively charged XeF2 molecule (XeF2+), one electron would be removed from the overall structure, resulting in a Lewis diagram with one fewer electron around the xenon atom. Conversely, for a negatively charged XeF2 molecule (XeF2-), an extra electron would be added to the overall structure, resulting in a Lewis diagram with one additional electron around the xenon atom.

In summary, the Lewis diagram for a charged molecule would involve modifying the number of electrons around the central atom to reflect the overall charge of the molecule.
 

1. How do you determine the charge of a molecule for a Lewis diagram?

The charge of a molecule is determined by subtracting the number of valence electrons from the number of electrons needed for a neutral atom, which is determined by its position on the periodic table.

2. What is the purpose of drawing a Lewis diagram for a charged molecule?

A Lewis diagram is used to show the arrangement of valence electrons in a molecule and to help predict its chemical and physical properties.

3. How do you draw a Lewis diagram for a positively charged molecule?

To draw a Lewis diagram for a positively charged molecule, you first determine the total number of valence electrons and then distribute them to the atoms in the molecule. The remaining electrons are placed on the central atom, which will have a positive charge.

4. What is the process for drawing a Lewis diagram for a negatively charged molecule?

The process for drawing a Lewis diagram for a negatively charged molecule is similar to that of a positively charged molecule, except that the central atom will have a negative charge and the remaining electrons will be distributed among the atoms to satisfy the octet rule.

5. Can a molecule have multiple possible Lewis diagrams depending on its charge?

Yes, a molecule can have multiple possible Lewis diagrams depending on its charge. The number of valence electrons and the arrangement of atoms can vary, resulting in different possible arrangements of electrons and multiple Lewis diagrams.

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