Basic Information
Symbol:
H
Atomic Weight:
1.008
Category:
Nonmetal
Group:
1
Period:
1
Block:
s
Physical Properties
Phase at STP:
Gas
Density (g/cm³):
0.00008988
Melting Point (K):
14.01
Boiling Point (K):
20.28
Atomic Properties
Electron Configuration:
1s¹
Electronegativity:
2.20
Atomic Radius (pm):
120
Ionization Energy (eV):
13.598
Other Information
Discovered By:
Henry Cavendish
Discovery Year:
1766
Named By:
Antoine Lavoisier