| 1. | In two types, hydrogen exits as either dihydrogen or as atomic hydrogen.
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| 2. | In atomic hydrogen welding, filler metal may or may not be used.
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| 3. | NASA has investigated the use of atomic hydrogen as a rocket propellant.
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| 4. | This atomic hydrogen passes through a collimator and a magnetic state selector.
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| 5. | This indication was found by detecting the extended exosphere of atomic hydrogen.
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| 6. | "High Temperature Hydrogen Attack " does not rely on atomic hydrogen.
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| 7. | Violet hue can occur when the spectrum contains emission lines of atomic hydrogen.
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| 8. | Assuming the cloud to consist of atomic hydrogen, the prefactor can be calculated.
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| 9. | Lowering temperatures into the milikelvin range can prolong the lifetime of atomic hydrogen condensates.
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| 10. | This is the well-known H-alpha line emitted by atomic hydrogen.
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