Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics
Form of thehelium atom in which thespins of the twoelectrons areparallel .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
ortho- + helium
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Examples
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In orthohelium, on the other hand, the tracks of the two electrons lie in the same plane, the one being circular, while the other is elliptical.
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It occurs in two different modifications: one is called parhelium, and is the more stable, and the other is called orthohelium - these were supposed at first to be two different substances.
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