C2h2 Lewis Structure Octet Rule. Lewis structure a is the correct answer. Atoms gain lose or share electrons with other atoms in order to fill their valence level with eight electrons.
Therefore we recommend that when you draw a structure that satisfies the octet rule you stop there without adding more bonds. The valence electrons can be counted using a lewis electron dot diagram as shown at the right for carbon dioxide. Atoms gain lose or share electrons with other atoms in order to fill their valence level with eight electrons.
Some students come to chem 101a having been taught to draw lewis structures with extra double bonds.
The valence electrons can be counted using a lewis electron dot diagram as shown at the right for carbon dioxide. Nitrogen provides 5 valence electrons each hydrogen provides one for a total of eight. We need three pairs to provide the three n h bonds. Distribute the remaining electrons as lone pairs on the terminal atoms except hydrogen completing an octet around each atom.
