Hydrogen
| Formula / Notation | H |
|---|---|
| CAS Number | 1333-74-0 |
| Molecular Weight | 1.008 |
| Also Known As | H₂, dihydrogen, hydrogen gas, protium (most common isotope) |
| Category | Elements |
What is Hydrogen?
Hydrogen is the lightest and most abundant element in the universe, making up about 75% of all normal matter by mass. It is a colourless, odourless, highly flammable diatomic gas at standard conditions.
Formula & Notation
Other Names / Synonyms: H₂, dihydrogen, hydrogen gas, protium (most common isotope)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Hydrogen is the lightest and most abundant element in the universe, making up about 75% of all normal matter by mass. It is a colourless, odourless, highly flammable diatomic gas at standard conditions.
Ammonia synthesis (Haber process). Petroleum refining. Fuel cells. Rocket propellant. Reducing agent in metallurgy.
Extremely flammable (4–75% range in air). Colourless and odourless. Cryogenic liquid causes frostbite.
The formula or notation for Hydrogen is: H