
Hydrogen - Wikipedia
Under standard conditions, hydrogen is a gas of diatomic molecules with the formula H2, called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen …
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Hydrogen | H2 | CID 783 - PubChem
Hydrogen is a colorless, odorless gas. It is easily ignited. Once ignited it burns with a pale blue, almost invisible flame. The vapors are lighter than air. It is flammable over a wide range of …
Hydrogen - Formula, Properties, Uses, Facts - Study Chemistry
Hydrogen, symbol H, molecular formula H2 is a colourless, odourless, tasteless, flammable gaseous chemical substances among the periodic table family
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Hydrogen - Reactivity, Uses, Properties | Britannica
Oct 17, 2025 · One molecule of hydrogen dissociates into two atoms (H 2 → 2H) when an energy equal to or greater than the dissociation energy (i.e., the amount of energy required to break …
What is h2 in chemistry? - California Learning Resource Network
Apr 18, 2025 · Hydrogen (H 2), a diatomic molecule consisting of two hydrogen atoms covalently bonded, holds a position of paramount importance in chemistry, physics, and increasingly, in …
Hydrogen (H) - Definition, Preparation, Properties, Uses, …
Jan 21, 2025 · We write H2 instead of H because hydrogen naturally exists as a diatomic molecule, meaning two hydrogen atoms bond together to form H2, the most stable form of …
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9.2: The H₂⁺ Prototypical Species - Chemistry LibreTexts
Mar 9, 2025 · Our understanding of atomic orbitals began with the exact solutions of a prototype problem – the hydrogen atom. We will begin our study of homonuclear diatomic molecules …