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Hydrogen
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Organic Chemistry
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Elements, Chemical
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characteristics of hydrogen
chemical compounds of hydrogen
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commercial applications
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energy source
food for bacteria
gas made of molecules
history of science
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hydrogen in space
cosmic rays
formation of the universe
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Jupiter – atmosphere
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Neptune, atmosphere of
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hydrogen in the environment
isotopes of hydrogen
odorless gas
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role in metal corrosion
slightly soluble in water
use by chemosynthetic organisms
use in balloons and dirigibles
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