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What is a Lewis Dot Diagram?
What is a Lewis Dot Diagram?
A Lewis Dot Diagram or Lewis Structure is a simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Valence electrons are shown as "dots" when unbonded or as a line when bonding two atoms.
Each atom supplies one of the two electrons in a bond
Lewis Structure
**Most atoms want an octet of 8 valence electrons, but not Hydrogen. Hydrogen wants only 2 valence electrons. This is because the 1 shell has only the 1s orbital which holds only 2 electrons.
Lone Pairs of Electrons
Lone Pairs of Electrons
Remember that electrons with opposite spin pair up in orbitals. Therefore, unbonded electrons pair up, and are known as Lone Pairs. They are represented by two dots
Multiple Bonds
Multiple Bonds
When two atoms need multiple electrons to fill their valence shell they may make multiple bonds. Sometimes atoms can make more than one bond with each other. If they form two bonds together it is called a Double Bond. If they make three bonds that is called a Triple Bond.
Practice!
Practice!
Lewis Structures Worksheet.pdfDrawingLewisDotStructuresrules.doc.docxPage updated
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