HYDROGEN

HYDROGEN (1) (GASEOUS)  1H=6(12.26 years)B- ; n=(15.3 min.)B-                 
Atomic radius:.079Deg.A (Quantum mech. value for free atom)                   
Atomic volume:14.4cm(3)/mol;Liquid state at boiling point                     
Atomic weight:1.00797 (Based on Carbon 12)                                   
Boiling point:20.268Deg.Kelvin                                               
Covalent radius:.032Deg.A                                                     
Crystal structure:Hexagonal                                                   
Density:.0889 g/l at 273Deg. Kelvin at 1 atm.                                 
Electrical conductivity:.010(x6)amu Ohm(x.1) cm(x.1) at 293Deg.Kelvin         
Electron configuration:1s(1)                                                 
Electronegativity:2.20 (Pauling's)                                           
First ionization potential:13.598 V                                           
Heat of fusion:0.058.68, kJ/mol at melting point                             
Heat of vaporization:0.44936, kJ/mol at boiling point                         
Melting point:14.058Deg.Kelvin                                               
Oxidation states:1 Amphoteric                                                 
Specific heat capacity:14.304, Jg(x.1) K(.1) at 300Deg.Kelvin                 
Thermal conductivity:.001815, W cm(x.1) K(x.1) at 300Deg.Kelvin               
Description:A nonmetallic element that is the simplest and lightest of the   
elements;is normally a colorless,odorless,highly flammable diatomic gas,and is
used especially in synthesis.                                                 

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