Question

What physical and chemical properties are determined in atoms or molecules by NMR?

Answer 1

See this [old answer and links.....](https://socratic.org/questions/how-to-identify-the-equivalent-and-non-equivalent-proton)

Explanation:

NMR spectroscopy interrogates molecular symmetry. Protons or spin active nuclei that can be interchanged by symmetry or by a fast-moving process, are said to be equivalent, and hence gives rise to the same absorption in the NMR spectrum...