H
1 diatomic nonmetal Generated with AI
Hydrogen
Symbol H
Atomic Mass 1.008
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.
Properties
- Phase: Gas
- Density: 0.08988 g/cm³
- Melting Point: 13.99 K
- Boiling Point: 20.271 K
Uses
- Combustible: Burns producing only water and heat, a very clean fuel.
- Oxyhydrogen Welding: Used with oxygen to weld metals (such as platinum) or melt quartz, as it produces a carbon-free flame.
- Petroleum Processing: Hydrocracking to produce gasoline and diesel.
- Ammonia Production: Essential for producing Ammonia via the Haber process.
- Metallurgy: Reducing agent to extract metals from their oxides.