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Lesson: Chapter 10 — Chemical Bonds

10.2. Covalent bonds 11 of 12

Question 11

What does this Lewis structure show around its central atom?

A nitrogen atom joined by a line to each of three hydrogen atoms, with two dots on the nitrogen atom.

The right answer is the one marked above.

Three bonding pairs and one lone pair. The three lines are the bonding pairs, and the two dots on the nitrogen atom are its one lone pair. This is ammonia.

Four bonding pairs with nothing left over would be methane. Ignoring the dots gives three bonding pairs and no lone pairs, and misses the lone pair entirely; two bonds and two lone pairs would be water.

Answer the question to continue.