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Published byCollin Greer Modified over 9 years ago
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Electrons The negatively charged subatomic particle
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Let’s review the structure of the atom 12 p + 12 n 0 An atom consists of the following things: Nucleus with protons and neutrons Electron cloud with electrons on the orbitals So why are these electrons a different color???
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Valence Electrons These electrons are the ones on the outermost shell of an atom (on the last orbital) that are involved in bonding. An atom may only have a MAXimum of 8 valence electrons. Having 8 valence electrons is called an octet.
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The periodic table has 8 representative groups 1 2 3 45 6 7 8
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Notice how the location of the element reveals how many valence electrons it has
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Now that you know all this, how can you use this information to draw Lewis Electron Dot Diagram Example: Draw the Lewis Electron Dot Diagram for the element Nitrogen. 1 st : Figure out what Representative group Nitrogen is in. That will tell you how many valence electrons it has. It’s in group 5 so it has 5 valence electrons. 2 nd : Write the symbol of the element. N 3 rd : Draw the valence electrons around the symbol starting from the top and in a clockwise direction. Remember, NEVER more than eight and you must go around the symbol once before you put them in pairs.
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What it shouldn’t look like. X X NO YES!!!
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Your Assignment and ticket out the door. On your own paper, draw the Lewis electron dot diagrams for: 1.Helium 2.Oxygen 3.Boron 4.Magnesium 5.Argon
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