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Lewis Structure

The Lewis Structure depicts the bonding between individual atoms and molecules through illustrating the presence of valence electron pairs. This type of structure/illustration can be drawn for any molecule held together by not only normal covalent bonds, but also coordinate covalent bonds. A normal covalent bond is a chemical bond that involves electron sharing between atoms. A coordinate covalent bond is a bond where the electrons are still shared between atoms; however it differs from a normal covalent bond in that the electron pair originates from just one of the atoms.

For example, the element carbon has the following Lewis structure, where there are 4 valence electrons surrounding it.

Image Credit: Wikimedia Commons


Methane on the other hand, which is comprised of one carbon and four hydrogen atoms, has the following Lewis Structure:


It can be seen that carbon and hydrogen share their electrons to form the four covalent bonds in methane. Thus, by drawing Lewis structures of molecules, no matter how complex they are, it makes it easier to see how the individual atoms are bonded as well as how the electrons interact with each other.

Lewis structures of acids and bases

1. Draw the Lewis structure of the conjugate base for the following acid: H2SO4. Remember to include charges and non-bonding electrons where necessary. Use an expanded octet on sulfur to minimize formal charges. 2. Draw the conjugate acid for the following base. ::Cl::- Remember to include charges and non-bonding electrons wh

Lewis Structures of Elements

5. Use the Lewis structure form to show the structures of the element F2 and N2 and the compounds NaCl, NH3 and H2O. Write out the molecules with stick formulae. 6. Use Lewis structures for the elements and so suggest a structure for the compound CCl2F2 called Freon-12. 7. Suggest why sodium exists as Na+ and not Na2+ in i

Draw the Lewis structure.

Perform steps a-d for the molecules described below in (e): a.) Draw the Lewis structure. b.) Count and give the number of regions of high electron density that exist around the central atom. c.) Identify the most stable arrangement of the regions of high electron density. d.) Diagram and name the type of structure that th

Lewis Structure: CN- Anion

(a) Draw the best Lewis dot structure for the anion CN- and indicate on the basis of formal charges whether you would expect the extra electron to be on carbon or nitrogen. Does this agree with the prediction based on electronegativity? Explain. (b) Given the atomic energy levels for the carbon and nitrogen atoms

Nonplanar or Planar Structure of Nitramide

a) Draw the Lewis structure of nitramide with a single bond between the two nitrogen atoms and include formal charges. Are there any resonance structures? If so, please draw these too. Describe the hybridization of the nitrogen atoms. b) Using the same atom connectivity as above, draw a Lewis structure with a double bond betwe

Lewis structure and chemical reaction

Nitric oxide, mononitrogen monoxide, is a gas at room temperature. Its Lewis structure has an unpaired electron and violates the octets rule. show its Lewis Structure. Show why this chemical is dangerous, by showing chemical reactions for its formation in the environment and its reactions in the atmosphere.