Making hydrogen gas at home requires water, a 9-volt battery, and two paperclips. Unbend the paperclips and attach one end of each to the battery. Then, put the opposite ends of each paperclip into the water. More »

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According to About.com, at standard pressure, hydrogen has a boiling point of minus 252.762 degrees Celsius, so converting it from a gas to liquid requires compressing and cooling it. Hydrogen is normally an odorless, co... More »

Hydrogen is the most common element in the universe and the first listed in the periodic table of elements. It is a colorless and odorless gas. Each atom of hydrogen contains one proton and one electron. More »

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H2 is the chemical formula for dihydrogen, also known as diatomic hydrogen, hydrogen gas and molecular hydrogen. This is the naturally existing form of elemental hydrogen. More »

Sodium metal reacts with water to form hydrogen gas and sodium hydroxide in an exothermic reaction. Exothermic reactions produce heat, and the sodium and water reaction produces enough heat to cause the hydrogen gas and ... More »

The most abundant elements in ocean water are hydrogen and oxygen, the two elements that constitute the water molecule. Excluding the water molecule, the most abundant elements in ocean water are sodium and chlorine. More »

Oxygen is a highly reactive and very abundant element that reacts with many things, including, as the University of California, Davis' ChemWiki points out, the reaction it has with hydrogen, which creates water. This ele... More »