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Chemical element
Next: helium (He)

The first, and lightest, element of Earth's periodic table. It has the symbol/abbreviation H. It is the most common of all elements, on a universal basis. In normal conditions, it is an invisible gas, but if electricity is passed through it, it will glow bluish-white. Deuterium and tritium are isotopes of hydrogen.

A vial of glowing hydrogen.

See also: List of elements

100x100px This article is part of Project Elements, a All Birds project that aims to write comprehensive articles on each element.