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Glycine as an Achiral Molecule

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I would like a proof for that an achiral molecule that consists of two similar components and two other distinct components are always superposable as for example glycine. I would believe I visual proof would be the most easy approach for me. Thank you! An image of glycine is in the attachment as an illustration.

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Solution Summary

This solution clearly defines what an achiral molecule is, with the help of two examples. And then this solution explains why glycine is achiral, with the help of a model. This solution will be an excellent guide for visualizing and conceptualizing similar problems.

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Visual proof of superposability for a distinct molecule
I would like a proof for that an achiral molecule that consists of two similar components and two other distinct components are always superposable as for example glycine. I would believe a visual proof would be the most easy approach for me. Thank you! An image of glycine is in the attachment as an illustration.
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Answer

You are right! Visualization is the key to these kind of problems. Often time a model in ...

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