Question

What are nuclear spin isomers?​

Answer 1

Explanation:

Molecular hydrogen occurs in two isomeric forms, one with its two proton nuclear spins aligned parallel (orthohydrogen), the other with its two proton spins aligned antiparallel (parahydrogen). These two forms are often referred to as spin isomers.

Parahydrogen is in a lower energy state than is orthohydrogen.

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