Making Atomic Hydrogen
It takes 4.476 Electronvolt to disassociate ordinary H2 hydrogen molecules. When they recombine, they liberate this energy. An electric arc or ultraviolet photon can generate atomic hydrogen.
Atomic hydrogen can be formed under vacuum at temperatures high enough (> 2000 K) to thermally dissociate the molecule, or equivalent excitation in an electric discharge. Also, electromagnetic radiation above about 11 eV can be absorbed by H2 and lead to its dissociation.
Read more about this topic: Nascent Hydrogen
Famous quotes containing the words making, atomic and/or hydrogen:
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—Henry David Thoreau (1817–1862)
“The atomic bomb certainly is the most powerful of all weapons, but it is conclusively powerful and effective only in the hands of the nation which controls the sky.”
—Lyndon Baines Johnson (1908–1973)
“All you of Earth are idiots!... First was your firecracker, a harmless explosive. Then your hand grenade. They begin to kill your own people a few at a time. Then the bomb. Then a larger bomb, many people are killed at one time. Then your scientists stumbled upon the atom bomb—split the atom. Then the hydrogen bomb, where you actually explode the air itself.”
—Edward D. Wood, Jr. (1922–1978)