Hydrogen is the first element on the periodic table. Hydrogen is a diatomic element. It is also one the elements that make up the compound water. Hydrogen is by far the most common element in the universe, accounting for 90% of the universe's weight.
Atomic Number-1
Density-0.0899 g/mL
Atomic Weight-1.00794 amu (g/mol)
Melting Point--258.97 C
Boiling Point--252.73 C
Atomic Radius-0.37 Covalent, 1.2 Van Der Waals
Ionization Potential-313 kcal/mol of atoms
Electronegativity-2.2
Electron Configuration-1s
Fusion Enthalpy-62.8 kJ/kg
Vapor Enthalpy-445 kJ/kg
Heat Capacity-1.43e4 J/kg C
Actinium Aluminum Americium Antimony Argon Arsenic Astatine Barium Berkelium Beryllium Bismuth Bohrium Boron Bromine Cadmium Calcium Californium Carbon Cerium Cesium Chlorine Chrominium Colbalt Copper Curium Dubnium Dysprosium Einsteinium Erbium Europium Fermium Florine Francium Gadolinium Gold Halfnium Hassium Helium Hydrogen Indium Iodine Iridium Iron Krypton Lanthanum Lawrencium Lead Lithium Lutetium Magnesium Manganese Meitnerium Mendelevium Mercury Molybdenum Neodymium Neon Neptunium Nickel Niobium Nobelium Osmium Oxygen Palladium Phosphorus Platinum Plutonium Polonium Potassium Praseodymium Promethium Protactinium Radium Radon Rhenium Rubidium Ruthinium Rutherfordium Samarium Scandium Seaborgium Selanium Silicon Silver Sodium Strontium Sulfer Tantalum Technetium Tellurium Turbium Thalium Thorium Tin Tantalum Tungsten Uranium Unbiquadium Ununbium Ununhexium Ununnillium Unununium Ununquadium Vanadium Xenon Ytterbium Yttrium Zinc Zirconium