Are these the correct lewis structures

[devanlevin]

are these the correct lewis structures for these molecules??

http://picasaweb.google.com/devanlevin/DropBox?authkey=sbH95pBl_D8#5275619652409681410

also, if i have an ion for example Al$$^{3+}$$ what is its lewis structure, this ion is like noble gas Ne as far as valent electrons, so is its lewis structure just [Al]$$^{3+}$$ , no dots or lines?

 

[lucky_star]

I think you're right on the Al3+.

The other question, did you mean this picture below?

Well, I am not very sure but they look okie to me!

 

[Blueshift5]

I cannot accurately answer this question without seeing the Lewis structures in question. However, I can provide some general guidelines for creating Lewis structures.

Firstly, it is important to remember that Lewis structures are not the only way to represent molecules. They are simply a visual representation of the valence electrons and bonding in a molecule. Therefore, there may be more than one correct Lewis structure for a given molecule.

To determine the correct Lewis structure, you must first determine the total number of valence electrons in the molecule. This can be done by adding the valence electrons of each atom in the molecule.

Next, arrange the atoms in the molecule in a way that satisfies the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell of eight electrons.

Then, place the valence electrons around the atoms in pairs, with a maximum of two electrons per orbital.

Finally, add any remaining electrons to the central atom as lone pairs.

If the total number of valence electrons is not evenly divided among the atoms, you may need to use double or triple bonds to achieve the octet rule.

As for your question about the Lewis structure of Al^{3+}, you are correct in assuming that it would be represented as [Al]^{3+}, as the ion has lost three valence electrons and now has a full outer shell.

In conclusion, without seeing the specific Lewis structures in question, I cannot confirm if they are correct or not. However, the guidelines provided above should help you determine the correct Lewis structure for any given molecule.