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.

one of three classes of primary metabolites and thus natural products. They are polyhydroxylated hydrocarbons and their derivatives. Colloquially, they are known as sugars. This tag …
177 questions
For questions relating to organic compounds which contain a bond between a carbon atom and a metal.
176 questions
For questions about the dipole moment of a bond or a molecule; its calculation, comparison with other bonds or molecules, affect on molecular properties, etc.
175 questions
Questions on the harmful effects of various substances on the human body, or biological organisms in general.
174 questions
highly reactive species, that have one or more unpaired electrons. Whether a species has unpaired electron(s) can be experimentally determined through electron pair resonance spectroscopy…
173 questions
For questions about the definition and usage of units of measurement.
170 questions
For questions about the reduction potential (A measure of the tendency of a chemical species to acquire electrons and thereby be reduced) or its applications. Also see the tag [electrochemistry].
For questions regarding the separation process consisting in the separation of a substance from a matrix. This tag can be used for generic extraction of elements from ore or more specific types of ext…
166 questions
Questions regarding the development and exploration of chemical ideas, innovations, and discoveries.
Questions about how the atomic orbitals of the dissociated atoms combine to give individual chemical bonds when a molecule is formed.
A material's ability to conduct electric current or thermal energy by any means.
163 questions
For questions about purification - the process of rendering something pure, clean of foreign or undesired elements. Not to be confused with [metallurgy] or [chromatography].
163 questions
For questions relating to the structures, properties, production methods and potential hazards of polymer materials commonly known as plastics
160 questions
For questions related to the chemical reactions and processes that result in a chemical reaching its solid phase.
158 questions
A method to measure how much a chemical substance absorbs light by measuring the intensity of light as a beam of light passes through sample solution.
152 questions
biopolymers consisting primarily of polycondensated amino acids.
For questions about the various atomic structure theories, including the Bohr theory. Not to be confused with the actual arrangement of atoms in macroscopic solids ([solid-state-chemistry]) or newer q…
Hydrolysis refers to any reaction with water. For example, it may be said that ammonia hydrolyzes in water to produce ammonium ion and hydroxide ion.
145 questions
Cheminformatics involves the production, processing, filtering, and searching of chemical information. This includes chemical databases, computational screening, searching, etc.
144 questions
The ionization energy of an atom or molecule describes the minimum amount of energy required to remove an electron from the atom or molecule in the gaseous state. Do not confuse with [electron-affinit…
142 questions
should be applied to questions about structural diagrams - diagrams used to show the crude location of possible existent bonds and lone pairs of electrons in a chemical species. Do not use th…
142 questions
substances or combinations used to diagnose, cure, treat, or prevent disease.
141 questions
For questions concerning crystalline structures and their properties.
141 questions
for questions regarding the principles and application of infrared spectroscopy.
138 questions
For questions about reduction reactions in organic chemistry, where a molecule of interest is reduced. Do not use for questions on general redox concepts.
136 questions
Questions related to the chemical and physical influences that influence the rate and probability of chemical reactions. Not to be confused with [catalysis] or [reaction-mechanism].
136 questions
Questions asking for identification of compounds in photos, by description, or given by a formula.
134 questions
should only be applied where the effects are specifically related to variance in mass number with the same atomic number (existence of isotopes). Examples include: radioactivity and other nuc…
131 questions
For questions about the valence shell electron pair repulsion (VSEPR) theory, in topics of: estimation of bond length, bond angle, bond energy, etc.; determining hybridization of atoms, or shape and g…
130 questions
Questions related to color as well as the reflecting and refracting properties of chemicals.
130 questions
For questions about the synthesis, properties, and reactions of ester compounds, both organic and inorganic.
127 questions
For questions involving (theoretical or experimental) comparison of density of elements or substances, calculating density of solutions, effects of temperature on density, and other chemical aspects o…
126 questions
For questions concerning compounds possessing rings with two or more different types of atoms.
124 questions
Questions regarding fuels and the properties of fuels, like calorific value, octane number, mechanism of combustion, etc., should use this tag.
123 questions
Questions about the assumptions, equations, and properties of gases derived from kinetic theory. For questions pertaining to rates of reactions, please use the kinetics tag instead.
120 questions
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
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