How you can draw electron dot structure of carbon dioxide?

The Carbon contributes 4 valance electrons and each oxygen contributes 6 valance electrons for a total of 16. Start by putting the Carbon in the middle of the two Oxygens. Each oxygen will have a double bond connecting it to the C in the middle.

The left over valance electrons will be put on the oxygens. For drawing purposes you could put two dots on the top and two dots on the bottom of each oxygen. Since I can't draw it out for you here it will look roughly like this: ::O=C=O:: The only difference is that instead of having the four dots together on the Oxygens, like I said above, you would put two dots on the top and two dots on the bottom of each Oxygen.

If you count the dots and bonds, each element has the 8 valance electrons that it wants and you have used all 16 that you needed to.

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