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...gas phase are oxygen and nitrogen (the main components of air), as well as hydrogen and at least four of the halogens (fluorine, chlorine, bromine, iodine, and

{{Image|Hydrogen sulfide.png|right|150px|}} ...fide'') is a [[chemical compound]] with the [[chemical formula|formula]] [[Hydrogen|H]]₂[[Sulphur|S]]. It is a colourless, highly toxic, flammable [

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...oes so less readily than carbonic acid. When the bicarbonate ion loses its hydrogen ion, it forms the double-charged negative carbonate ion (CO₃<sup

...is a [[choking gas]] that reacts with water to produce carbon dioxide and hydrogen chloride gas, which is corrosive. Exposure can lead to [[pulmonary edema]] ...px|Phosgene decomposes in the presence of water to form carbon dioxide and hydrogen chloride gas.}}

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|elClass=Periodic table of elements{{!}}Like Hydrogen, Tritium can behave as a Metal and a Non-Metal ...symbol '''T''' or '''³H''', is an [[isotope]] of the element [[hydrogen]] that has a nucleus containing one [[proton]] and two [[neutron]]s (i.e.,

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...ein]]s. The ''[[side chain]]'', or ''[[residual group]]'' of glycine is a hydrogen atom. It is one of the non-polar amino acids.

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...terize as abnormally increased acidity &mdash; measured as pH reduction or hydrogen ion concentration ([H⁺]) increase &mdash; accompanied by abnorma

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