We’re being asked to identify the **bond angles** around nitrogen in **glycine**. Since the Lewis structure for glycine is already given, we simply need to do the following steps:

*Step 1:* Determine the number of electron groups around the indicated atom.

*Step 2:* Determine the electron geometry and bond angle using this:

**Electron Regions Electronic Geometry Bond Angles**

2 linear 180˚

3 trigonal planar 120˚

4 tetrahedral 109.5˚

5 trigonal bipyramidal 90˚, 120˚, and 180˚

6 octahedral 90˚ and 180˚

Consider the Lewis structure for glycine, the simplest amino acid:

What are the approximate bond angles at the nitrogen?

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