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Methane (/ËmÉÎ¸eÉªn/ or /ËmiËÎ¸eÉªn/) is a chemical compound with the chemical formula CH4 (one atom of carbon and four atoms of hydrogen).ethane can be produced by hydrogenating carbon dioxide through the Sabatier process. Methane is also a side product of the hydrogenation of carbon monoxide in the Fischer-Tropsch process. This technology is practiced on a large scale to produce longer chain molecules than methane.
Density 13.546 g/cm3. Characteristics: Mercury is one of the few liquid elements. It dissolves in oxidizing acids, producing either Hg2+ or Hg22+, depending on which reagent is in excess. The metal is also soluble in aqua regia (a mixture of hydrochloric and nitric acids) to form HgCl42-.