Why Does The Lewis Structure For NH2 Have 4 Dots And Not 3?

This question already has answers here: Why is NH2 negatively charged? (2 answers) Closed 3 years ago.

Nitrogen has 5 valence electrons.

So I would expect that when bonding with two hydrogens, two electrons would go into those bonds, and three would remain in place on the nitrogen.

Yet, all the diagrams I see for it look like this

nh2 diagram

Why are there 4 dots and not 3?

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