Fill in the Blanks Lewis Dot DiagramsOnline version Fill in the blanks about the image. by Devon Heath 1 oxygen 5 4 phosphorous pair electrons 8 double octet lone 2 triple side more Sulfur valence 3 one electrons When starting a Lewis structure , 1 electron is placed on each of the element symbol . Only when more than electrons need to be shown will there be pairs of electrons on a side of the element symbol . Each single bond ( one line ) contains electrons . In the compound CCl4 , carbon can make four bonds because it has four . Each chlorine will make bond with the carbon in order to satisfy its . In the compounds NH3 , there is one because the nitrogen atom starts with valence electrons and only of them are in bonds . Hydrogen is satisfied with only 1 bond to nitrogen because it only needs 2 to have a filled valence shell . In N2 , the nitrogens will be attached by a bond ; this satisfies their octet because they started with 5 valence electrons and gained another 3 in the bonds . When a compound has an overall negative charge it indicates that there are electrons in the Lewis structure than the valence electrons the atoms started with . In the water molecule ( H2O ) there are 2 lone pairs on the atom . and commonly exceed an octet , meaning they can have more than electrons . In O2 , the oxygens will be attached by a bond ; this satisfies their octet because they started with 6 valence electrons and gained another 2 in the bonds .
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