Hydrogen
Hydrogen (H) is a chemical element belonging to the category Non-metal, with atomic number 1 and atomic mass 1.0080 u. This sheet describes its fundamental properties, periodic position and physical characteristics.
Identity
- Name: Hydrogen
- Symbol: H
- Atomic number: 1
- Atomic mass: 1.0080 u
Position in the periodic table
- Group: 1 (often placed here but behaves as a non-metal)
- Period: 1
- Category: Non-metal
Physico-chemical properties
- Standard state: Gas
- Melting point: -259.16°C
- Boiling point: -252.87°C
- Density: 0.0899 g/L (0°C, 1 atm)
- Electron configuration: 1s¹
Scientific description
Hydrogen is a chemical element with symbol H and atomic number 1. It is often placed in group 1 because of its 1s¹ configuration but chemically behaves as a non-metal. Its standard atomic mass is 1.0080 u.
KODO: G1