Which diagram of water molecules is correct?

  • #1
lioric
280
5
TL;DR Summary
Which way is the correct way to draw dot and cross covalent structures
I've seen both types of diagrams when drawing covalent dot and cross diagrams. And some students that I teach said that the electrons should be on the circles.
But I do know that this is actually showing the electron overlap and electron field and in reality electrons are not in circular orbits, it's more complex than that. So is either of these correct?
 

Attachments

  • main-qimg-8d48ba5e8809799ce187e514f7acfd58.gif
    main-qimg-8d48ba5e8809799ce187e514f7acfd58.gif
    7.8 KB · Views: 57
  • IMG_20210922_224510.jpg
    IMG_20210922_224510.jpg
    23.4 KB · Views: 49

Answers and Replies

  • #2
Bystander
Science Advisor
Homework Helper
Gold Member
5,418
1,503
No. These are representations. Models/simulacra/...
 
  • #3
jim mcnamara
Mentor
4,688
3,630
Students new to Chemistry often take the representations meant to learn something like, maybe bonding, but they take it literally and assume these have direct physical meaning. Just because you can draw it does not make it reality. Example: I can draw unicorns.
 
  • #4
lioric
280
5
Thank you very much for your input
May I know the proper way to draw the dot cross / Lewis structure
 
  • #5
Bystander
Science Advisor
Homework Helper
Gold Member
5,418
1,503
proper way
You will have to tell us a bit more about yourself to give us an idea which "proper way" applies; age, professional/amateur/physicist/chemist/biologist/geologist... We can see what you're asking; just ask the question. What do you actually want to know?
 
  • #6
lioric
280
5
You will have to tell us a bit more about yourself to give us an idea which "proper way" applies; age, professional/amateur/physicist/chemist/biologist/geologist... We can see what you're asking; just ask the question. What do you actually want to know?
For grade 8,9,10 chemistry students
 
  • #7
Bystander
Science Advisor
Homework Helper
Gold Member
5,418
1,503
  • #8
Borek
Mentor
29,167
3,838
There is no such thing as a "proper way" here. There are conventions of drawing the diagram, you can freely choose whichever suits you best (preferably the one course textbook uses, it will make easier for you and your students to discuss the bonds). But the important thing here is: don't let the convention become a "fact". Diagram is a way of expressing some underlying logic, convention is a way of drawing the diagram - it is the underlying logic that is important, everything else is secondary.

(Actually even this "logic" is a simplification of reality and is in a way secondary to what is really going on in molecules).
 
  • Like
Likes Bystander, BillTre and lioric
  • #9
lioric
280
5
There is no such thing as a "proper way" here. There are conventions of drawing the diagram, you can freely choose whichever suits you best (preferably the one course textbook uses, it will make easier for you and your students to discuss the bonds). But the important thing here is: don't let the convention become a "fact". Diagram is a way of expressing some underlying logic, convention is a way of drawing the diagram - it is the underlying logic that is important, everything else is secondary.

(Actually even this "logic" is a simplification of reality and is in a way secondary to what is really going on in molecules).
Thank you very much for all your input. When I talk here it always dawn's up on me for how little I know and that there is so much of knowledge out there.
I really appreciate your help.
I'll consider this as resolved
 
  • #11
lioric
280
5
You are a teacher? Then maybe you ought to consult an introductory text on theoretical chemistry, like (the first decent looking find in google):
http://simons.hec.utah.edu/NewUndergradBook/TableofContents.html
Yes I'm a teacher.
I just wanted to see if drawing in either method would be wrong
I do know it's a concept and neither of them is how real structure looks like
Thank you for the link
 

Suggested for: Which diagram of water molecules is correct?

  • Last Post
Replies
2
Views
373
  • Last Post
Replies
23
Views
528
Replies
8
Views
488
Replies
7
Views
892
Replies
6
Views
1K
Replies
1
Views
1K
Replies
14
Views
3K
Replies
20
Views
881
Replies
5
Views
359
Replies
1
Views
1K
Top