Essay Topics
Types of Essays
Essay Checklist
Word Counter
Readability Score
Essay Rewriter
The concepts of formal charge and partial charge are useful to chemists when dealing with Lewis structures. Formal charge is the difference between valence electrons and the number of electrons assigned to an atom that shows if an atom is positive or negative. Partial charge is the affinity for electrons of bonded atoms that is determined by their AVEE, the average valence electron energies. While both concepts essentially give chemists the charge of atoms of Lewis structures, there are similarities and differences between the two. Formal charge helps chemists identify which atoms in the molecule are likely to be positive or negative without any complicated calculations. It helps to determine the best Lewis structure where the best structure is the one with the lowest formal charge. Take CO2 for example, there are two Lewis structure. The first Lewis structure is a carbon double bonded to two oxygen. The second structure is a carbon single and triple bonded to two oxygens. In the first structure, the formal charge of the oxygens and carbon is zero. In the second structure it is 1, 0, -1. Since the first Lewis structure had the lowest formal charge, 0, it is the best. Partial charge, however, deals with the charge on atoms due to uneven distribution of bonding electrons. It represents the actual charge of the atoms whereas formal charge does not. For example, if the formal charge concept was applied to the molecule HCl, it would show that each atom would have no charge because the difference between the valence electrons and assigned electron is zero for both atoms. However, using partial charges, it would reveal that the atoms in HCl do have a charge. Cl would be negative and H would be positive because the AVEE of Cl is significantly higher than H causing the electron to be pulled closer to Cl. To find the exact magnitude of the partial charge requires calculation that is slightly harder than formal charge. On the other hand there is one thing that both concepts share. The sum of all the formal charge is equal to the net charge of the molecule as with partial charge, the sum of all partial changes is equal to the net charge. This means that the sum of the formal charge and partial charge, for a molecule like NO3
Essay Writing Checklist
The following guidelines are designed to give students a checklist to use, whether they are revising individually or as part of a peer review team.
Introduction
  • Is the main idea (i.e., the writer's opinion of the story title) stated clearly?
  • Is the introductory paragraph interesting? Does it make the reader want to keep on reading?
Body Paragraph
  • Does each body paragraph have a clear topic sentence that is related to the main idea of the essay?
  • Does each body paragraph include specific information from the text(including quoted evidence from the text, if required by the instructor)that supports the topic sentence?
  • Is there a clear plan for the order of the body paragraphs (i.e., order of importance, chronology in the story, etc.)?
  • Does each body paragraph transition smoothly to the next?
Conclusion
  • Is the main idea of the essay restated in different words?
  • Are the supporting ideas summarized succinctly and clearly?
  • Is the concluding paragraph interesting? Does it leave an impression on the reader?
Overall Essay
  • Is any important material left unsaid?
  • Is any material repetitious and unnecessary?
  • Has the writer tried to incorporate "voice" in the essay so that it has his/her distinctive mark?
  • Are there changes needed in word choice, sentence length and structure, etc.?
  • Are the quotations (if required) properly cited?
  • Has the essay been proofread for spelling, punctuation, grammar, etc.?
  • Does the essay have an interesting and appropriate title?
The Partial and formal Changes in Chemistry essay
Trending Essay Topics
Explore today's trending essay topics:
Reference
Feel free to use content on this page for your website, blog or paper we only ask that you reference content back to us. Use the following code to link this page:
Terms · Privacy · Contact
Essay Topics © 2020

The Partial And Formal Changes In Chemistry Essay

Words: 385    Pages: 1    Paragraphs: 4    Sentences: 21    Read Time: 01:24
Highlight Text to add correction. Use an editor to spell check essay.
              The concepts of formal charge and partial charge are useful to chemists when dealing with Lewis structures. Formal charge is the difference between valence electrons and the number of electrons assigned to an atom that shows if an atom is positive or negative. Partial charge is the affinity for electrons of bonded atoms that is determined by their AVEE, the average valence electron energies. While both concepts essentially give chemists the charge of atoms of Lewis structures, there are similarities and differences between the two.
             
             
              Formal charge helps chemists identify which atoms in the molecule are likely to be positive or negative without any complicated calculations. It helps to determine the best Lewis structure where the best structure is the one with the lowest formal charge. Take CO2 for example, there are two Lewis structure. The first Lewis structure is a carbon double bonded to two oxygen. The second structure is a carbon single and triple bonded to two oxygens. In the first structure, the formal charge of the oxygens and carbon is zero. In the second structure it is 1, 0, -1. Since the first Lewis structure had the lowest formal charge, 0, it is the best.
             
              Partial charge, however, deals with the charge on atoms due to uneven distribution of bonding electrons. It represents the actual charge of the atoms whereas formal charge does not. For example, if the formal charge concept was applied to the molecule HCl, it would show that each atom would have no charge because the difference between the valence electrons and assigned electron is zero for both atoms. However, using partial charges, it would reveal that the atoms in HCl do have a charge. Cl would be negative and H would be positive because the AVEE of Cl is significantly higher than H causing the electron to be pulled closer to Cl. To find the exact magnitude of the partial charge requires calculation that is slightly harder than formal charge.
             
              On the other hand there is one thing that both concepts share. The sum of all the formal charge is equal to the net charge of the molecule as with partial charge, the sum of all partial changes is equal to the net charge. This means that the sum of the formal charge and partial charge, for a molecule like NO3
Chemistry Essay 
Tip: Use our Essay Rewriter to rewrite this essay and remove plagiarism.

Add Notes

Have suggestions, comments or ideas? Please share below. Don't forget to tag a friend or classmate.
clear
Formatting Help
Submit