A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

For questions about cleaning agents and methods used to remove dirt, stains, residues, and bad smells, including proper waste disposal. For particular questions about surfactants, use the [surfactants…
119 questions
For questions about determining the paramagnetism, diamagnetism, etc. of chemical species and other chemical applications of magnetism. Note that questions oriented towards physical aspects of electro…
118 questions
Questions relating to radioactive substances and the chemistry of radioactivity. Also, use [rare-earth-elements] if the question is about their radioactivity specifically.
118 questions
should be applied to questions about the various allotropes of carbon and their physical or chemical properties. Most important modifications are diamond, graphite, fullerenes, graphene and n…
117 questions
For questions about the concept of aromaticity. Do not use for reactions of aromatic compounds.
117 questions
For questions relating to the synthesis of supramolecular, or colloidal structures and their properties or manufacturing processes of characterization for nano-featured structures.
113 questions
For questions involving electricity in the scope of chemistry. Note that questions about electrical circuits, semi-conductor diodes, etc. are off topic and more suited for EE.SE or Phy.SE.
112 questions
For questions about the atomic radius - a measure of the size of an atom, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding "cloud" of electrons.
112 questions
macromolecular biological catalysts that alter the rate of a reaction. Use this tag for question regarding enzyme kinetics, classification and action.
110 questions
Also known as cis/trans isomerism, configurational isomerism, or E/Z isomerism when referring to alkenes.
107 questions
on E1, E2, E1cb, or any other type of elimination reaction.
106 questions
For questions that deal with possible errors in a specific statement of a specified book, article, website, etc. These questions should always include a complete reference (see tag wiki for format).
105 questions
For questions about conformational isomerism. Use this tag alongside [stereochemistry].
103 questions
For questions about the process of distillation. For the distillation process used in metal refining, also use the [metallurgy] tag.
102 questions
for questions about phenols, their synthesis, analysis, properties and more. Do not use the 'alcohols' tag for phenols due to the differences between the two classes.
102 questions
for questions about amino acids, both natural and non-natural ones. It should only be applied to questions about the monomers. For peptides and proteins, use the proteins tag instead.
102 questions
Questions about any process which makes water more acceptable for an end use.
100 questions
For questions about the synthesis, properties, and reactions of organic compounds containing the -NO2 group i.e. nitro-compounds.
99 questions
The systematic discussion of molecular symmetry is known as group theory. Group theory is a systematic way of describing the symmetry of molecules using concepts/rules borrowed from mathematics. This…
98 questions
For questions regarding chemicals and chemical processes that act on and interact within environmental systems.
94 questions
The adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to a surface.
93 questions
For questions regarding the chemical processes or chemicals involved in distinguishable smells
91 questions
Questions discussing explosive nature of chemicals. Also, consider using the safety tag.
90 questions
Chemical processes and theories being used in practical and experimental applications.
89 questions
a type of angular momentum which is intrinsic to atomic and sub-atomic particles. Electrons in orbitals can be either spin paired or spin unpaired which influences the magnetic properties of t…
88 questions
the process of design, synthesis, and testing of molecules (drugs) for the treatment of infection and disease. The medicinal-chemistry tag should be applied to all question…
87 questions
For questions involving selectivity as to where a functional group reacts.
87 questions
For questions about alloys.
85 questions
Questions about compounds that lower the surface tension (or interfacial tension) between two liquids or between a liquid and a solid.
83 questions
For questions relating to the electronic structure of inorganic complexes, particularly the splitting of degenerate $d$ or $f$ orbitals by the symmetry of the surrounding ligands.
83 questions
Questions about elements of group 18 (group 0 in old notation) of the periodic table and their compounds, created despite the low reactivity of these elements.
82 questions
For questions about the decomposition of any chemical species, under any certain conditions.
81 questions
a method in computational chemistry that is used to study the movement of atoms and molecules.
79 questions
For questions related to dissolving and subsequently precipitating as substance. The purpose may be for purifying, creating polymorphs, or other reasons.
75 questions
Electromagnetic radiation (EM radiation, EMR, or light) is a form of energy released by electromagnetic processes. In physics, all EMR is referred to as light, but colloquially light often refers excl…
74 questions
For questions about formal charge in any molecule. Do not confuse with [oxidation-state].
72 questions
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