Definition: Hydrogen is the name for the element with atomic number 1 and is represented by the symbol H.
It is a member of the nonmetal group.
It is a member of the nonmetal group.
Hydrogen Definition
By Anne Marie Helmenstine, Ph.D., About.com Guide
This is a vial containing ultrapure hydrogen gas. Hydrogen is a colorless gas that glows violet when ionized.
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