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Science ClassesPlay
Hydrogen is often discussed in chemistry and physics as part of the periodic table of elements. SlideIn our chemistry class, we learned that hydrogen is the first element on the periodic table.
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Cosmic AbundancePlay
Hydrogen is the most abundant element in the universe, relevant in space-related contexts. SlideAstronomers estimate that hydrogen makes up about 75% of the universe's elemental mass.
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Common CompoundPlay
Hydrogen is part of many everyday compounds, such as water and organic substances. SlideEvery molecule of water has two hydrogen atoms bonded to an oxygen atom.