Lewis Electron Dot Structure (L.E.D.S) PDF
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This document explains Lewis electron dot structures, which are diagrams illustrating chemical bonding and valence electrons in molecules. It covers the basics of drawing these structures for various molecules such as water, carbon dioxide, and oxygen.
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LEWIS ELECTRON DOT STRUCTURE (L.E.D.S) CHEMISTRY 9 Lewis dot structures also called electron dot structures are diagrams that describe the chemical bonding between atoms in a molecule. They also display the total number of lone pairs present in each of the atoms that constitute the molecule...
LEWIS ELECTRON DOT STRUCTURE (L.E.D.S) CHEMISTRY 9 Lewis dot structures also called electron dot structures are diagrams that describe the chemical bonding between atoms in a molecule. They also display the total number of lone pairs present in each of the atoms that constitute the molecule. Learn how to draw Lewis Diagram for: Atoms and Simple molecules How many valence electrons does chlorine have? Lewis Diagram of Hydrogen Number of bonds 1 line = single bond = 2 electrons 2 line = double bond = 4 electrons 3 lines = triple bons = 6 electrons Example of molecule with a double bond is oxygen Notice that in this Lewis diagram both oxygen atoms have 8 valence electrons, 4 from the double bond and 4 from the lone pairs of electrons. By the way, 2 dots together are called lone pair of electrons. NITROGEN Some molecules contain triple bonds, which we write using 3 lines that represent the sharing of 6 electrons. Draw the Lewis diagram of a molecule 1. Count all the valence electrons Water (H2O) 2. Determine the center atom (the element there is only one of) H2 = 1 X 2 = 2 O= 6X1=6 3. Draw single bonds to the central atom Total = 8 v.e 4. Put all of the remaining valence electrons on atoms as lone pairs. 5. Turn lone pairs into double or triple bonds o give every atom an octet. Draw the Lewis diagram of a molecule 1. Count all the valence electrons Carbon Dioxide (CO2) 2. Determine the center atom (the element there is only one of) C =4 X 1 = 4 O = 6 X 2 = 12 3. Draw single bonds to the central atom Total = 16 v.e 4. Put all of the remaining valence electrons on atoms as lone pairs. 5. Turn lone pairs into double or triple bonds o give every atom an octet. Lewis diagram of SO3 S = 6 X 1 =6 O3 = 6 X 3 = 18 Total = 24v.e Exercises using show me board
