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Hydrogen Single Atom Existence

Is hydrogen a single atom existing in the world? I have heard that hydrogen often exists in the state of diatomic molecules (H ²) in nature. Because its outer layer has only one electron, in order to achieve a stable structure, it often shares electron pairs with other hydrogen atoms to form covalent bonds, so the state of diatoms is stable.

However, in certain extreme situations, hydrogen can also exist in the state of a single atom. For example, in the interior of a star with extremely high temperature, or in a special experimental environment with strong radiation and high energy, the atoms collide violently, and the energy is extremely high, which is enough to break the bonds of hydrogen molecules, and hydrogen becomes a single atom.

Furthermore, in a vacuum environment with extremely low pressure, the probability of hydrogen atoms meeting is extremely low, and there is also a chance to exist briefly in the form of a single atom. However, this single-atom hydrogen is extremely active, and it is easy to recombine into hydrogen molecules once the environment changes.

In summary, although hydrogen is usually in a diatomic state, it can also survive in the form of a single atom under special conditions such as extreme high temperature, strong radiation, and high vacuum.