| The formula for the next molecule is C2H4.
The name is ethene, but that tells you nothing because you have not yet learned about
naming organic compounds. In this case, you must rely on the molecular formula. You also
need to know that the two carbon atoms are bonded together in the middle and that the
hydrogen atoms are spread around them. Again, put in the electron dots for the center
atoms keeping in mind what the outside atoms need. Each carbon electron dot diagram has
one dot pointed toward each hydrogen because each hydrogen needs one electron, and two
electrons pointed toward the other carbon because the other carbon needs two electrons.
Now draw in dots for the outside atoms taking into account what the central atoms need.
Each of the hydrogen atoms has its dot pointed toward the carbon because each carbon will
get one electron from each hydrogen. Again bring them together and you've got the electron
dot diagram for C2H4. |
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H · |
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· C ·
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· C ·
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H · |
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H · |
H · |
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