How many hydrogen atoms are needed to complete the following structure? C=C-N-C

Question

Quizplus · Accepted Answer

The structure C=C-N-C requires 7 hydrogen atoms to complete it. Carbon atoms typically form four bonds each. The double bond between the first two carbon atoms accounts for two of the four bonds needed for each of those carbons, leaving each needing two more bonds, which will be with hydrogen. The nitrogen atom forms three bonds (it already has three in the structure provided, one with carbon and a lone pair of electrons), so it does not need any additional hydrogens. The last carbon atom needs three hydrogens to complete its four bonds. Therefore, the total hydrogen count needed is 2 (from the first carbon) + 2 (from the second carbon) + 3 (from the last carbon) = 7.

How Many Hydrogen Atoms Are Needed to Complete the Following