Lewis structures (also known as Lewis dot diagrams, electron dot diagrams, Lewis dot formulas, Lewis dot structures, and electron dot structures) are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
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- A simple way of indicating the covalent bonds in molecules is to use what are called Lewis structures, or electron-dot structures, in which the valence shell electrons of an atom are represented as dots. … Simpler still is the use of Kekulé structures, or line-bond structures, in which a two-electron covalent bond is indicated as a line drawn between atoms.
- John McMurry, Organic Chemistry 8th ed. (2012), Ch. 1 : Structure and Bonding