| Symbol |
H |
|
| Atomic Number |
1 |
Relative Atomic Mass
12C = 12.0000 |
1.00794 |
Atomic Radius
pm |
78 |
First Ionisation Energy
kJ mol-1 |
1312.0 |
| Electronegativity |
2.20 |
Density
kg m-3 |
76.0 [11 K]
70.8 [b.p.]
0.08988 [273 K] |
Molar Volume
cm3 |
13.26 [11 K] |
Thermal Conductivity
W m-1 K-1 |
0.1815 [300 K] |
Melting Point
K |
14.01 |
Boiling Point
K |
20.28 |
| Number of Isotopes |
3 |
Ground State Electron
Configuration |
1s1 |
| Term Symbol |
2S1/2 |
| Discovery |
H. Cavendish (London, England) in 1766 |
| Name Derived From |
Greek hydro genes meaning 'water forming' |
Name in Other
Languages |
 Croatian | Vodik |
 Danish | hydrogen |
 Dutch | waterstof |
 Finnish | vety |
 French | hydrogènes |
 German | Wasserstoff |
 Italian | idrogeno |
 Norwegian | hydrogen |
 Portuguese | hidrogénio |
 Spanish | hidrógeno |
 Swedish | väte |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
