(1400.0u"mg kg^-1", 108000.0u"mg L^-1", "density(@ -253C), evaporation_heat(H-H), fusion_heat(H-H), ", 1, 25.0u"pm", 154.0u"pm", 14.1u"cm^3 mol^-1", 1.008u"u", missing, "s", 20.28u"K", 6.499026705, 6.51, "1333-74-0", missing, 31.0u"pm", 32.0u"pm", missing, missing, "#ffffff", 8.2e-5u"g cm^-3", "Colourless, odourless gaseous chemical element. Lightest and most abundant element in the universe. Present in water and in all organic compounds. Chemically reacts with most elements. Discovered by Henry Cavendish in 1776.", 4.50711, 3.0e-5, "Henry Cavendish", "England", 1766, 0.754195u"eV", "1s", 13.61u"eV", 0.2638, 2.2, 0.904u"kJ mol^-1", 0.117u"kJ mol^-1", missing, "volatile", 103, "atmophile", 1, 217.998u"kJ mol^-1", false, false, "#ffffff", 3.75u"Å", "HEX", 14.01u"K", 105, missing, 78.0u"pm", "#f2f2f2", "Hydrogen", "Greek: hydro (water) and genes
(generate)", 1, 103, missing, 1, "Commercial quantities are produced by reacting superheated steam with methane or carbon. In lab work from reaction of metals with acid solutions or electrolysis.", missing, :H, 0.1815u"W K^-1 m^-1", "Most hydrogen is used in the production of ammonia. Also used in balloons and in metal refining. Also used as fuel in rockets. Its two heavier isotopes are: deuterium (D) and tritium (T) used respectively for nuclear fission and fusion.", 110.00000000000001u"pm", 120.0u"pm", missing, 120.0u"pm", 319.5u"pm", 162.0u"pm", 110.00000000000001u"pm", missing, 288.6u"pm")
