Symbol H Atomic radius: pm 37 Fusion: kJ/Mole 0.12
Name Hydrogen Ionic radius: pm - Boiling point: C -253
Atomic number 1 Electron affinity 0.75 Melting point: C -259
Atomic weight 1.008 1st  ion potential 13.60 Specific Heat Cap: J/(g K) 14.30
Classification Non-metal Natural form Gas Thermal Cond: W/(cm K) 0.002
Configuration 1s1 Crystal structure Hex Electrical Cond -
Oxidation states 1 Density 0.089 Abundance: mg/kg-crust 1400
Electronegativity 2.2 Vaporization: kJ/Mole 0.90    
Hydrogen was discovered in 1766 by Henry Cavendish

Uses - rocket fuel, metal refining, was used in balloons in the past, but was discontinued because hydrogen is highly flammable