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Hydrogen

usgb/ˈhaɪdrədʒən/Volume
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Science Classes

Hydrogen is often discussed in chemistry and physics as part of the periodic table of elements.

Illustration for Science Classes
In our chemistry class, we learned that hydrogen is the first element on the periodic table.
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Cosmic Abundance

Hydrogen is the most abundant element in the universe, relevant in space-related contexts.

Illustration for Cosmic Abundance
Astronomers estimate that hydrogen makes up about 75% of the universe's elemental mass.
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Common Compound

Hydrogen is part of many everyday compounds, such as water and organic substances.

Illustration for Common Compound
Every molecule of water has two hydrogen atoms bonded to an oxygen atom.
Visual representation of the word "Hydrogen"

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