Type
Other nonmetal
Group / Period
1 / 1
Phase @ STP
Gas
Electron Block
s
Common Ions
H+
→
Hydron
H-
→
Hydride
Avg. Atomic Mass
1.008
Configuration
1s1
Valence Electrons
1
1
p⁺ Protons
0
n⁰ Neutrons
1
e⁻ Electrons
1st Ionization
1312
kJ/mol
Electron Affinity
72.8
kJ/mol
Electronegativity
2.20
Pauling
Specific Heat
14.300
J/(g·°C)
Discovery Year
1766
Discovered By
Henry
Cavendish
Named By
Antoine
Lavoisier
STSE
Context
Energy transition (Fuel Cells)
Hydrogen as energy carrier
Heavy
Water (D₂O) • CANDU
Common Uses
Ammonia Production • Hydrogenation
Hazards
Highly Flammable • Explosion Risk
Type
Noble Gas
Phase
Gas
Group
18
Period
1
Chemical Property
Amphoteric
Properties & Structure
Ionization Energy
13.6 eV
Electron Affinity
72.8 kJ/mol
Electron Configuration
1s¹
Common Uses & Hazards
Batteries, Radiation Shielding (X-Ray),
Construction
Neurotoxin (Brain/Nerve damage),
Bioaccumulation
Rotate and explore the 3D atom model.