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.

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a branch of chemistry that deals with organic molecules. Organic molecules generally have C-H or C-C bonds.
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part of your high school or college/university homework, please use this tag. It signifies that instead of a direct answer, care should be taken to explaining the steps to the solu…
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The study of chemical systems using the laws and concepts of physics. This usually requires the techniques of thermodynamics, statistical mechanics and quantum mechanics.
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Inorganic compounds generally do not have C-H bonds, while organic compounds do have such bonds. The distinction between inorganic and organic chemistry, however, is far from absolute.
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should be applied to questions concerning acid and base reactions. An acid is capable of donating a hydron/ proton (Brønsted acid) or capable of forming a covalent bond with an electron pair …
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Applications of chemistry to reagents and reactions of everyday life.
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Questions relating to heat and its relation to other forms of energy in chemistry.
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The step by step sequence of elementary reactions by which overall chemical change occurs.
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an interaction between atoms which results in release of energy. It is one of the most fundamental concepts of chemistry. Existing bonds are broken and new bonds are formed in chemi…
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The branch of chemistry that deals with the study of redox reactions and how they can be applied to generate electricity (in electrochemical cells) and to carry out non-spontaneous reactions using ele…
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Reduction-oxidation reactions: all chemical reactions in which atoms have their oxidation state changed.
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The state in which both reactants and products are present at concentrations which have no further tendency to change with time.
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The scientific study of chemical processes in living organisms, including, but not limited to, living matter.
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For questions relating to water (H2O), specifically its structure, properties, and uses in chemistry.
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a subfield of quantum mechanics. Like the parent it focuses on physical phenomena that occur at an atomic scale, usually specifically aiming at chemical reactions.
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For questions relating to compounds dissolved in water and resulting reactions.
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an electrically neutral group of two or more atoms held together by covalent chemical bonds
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The study of rates and steps (mechanisms) of chemical processes.
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should be applied to questions relating to the theory, design, techniques or performance of chemical experiments. This includes but is not limited to theoretical structures, expected products…
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For questions related to the solubility of compounds in various solvents, especially in water.
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A small-scale experiment which can be undertaken with reagents readily available around the house, while observing standard laboratory safety principles and practices
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A basic unit of matter that consists of a dense central nucleus surrounded by a cloud of negatively charged electrons.
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An atom or molecule in which the total number of electrons is not equal to the total number of protons, giving it a net positive or negative electrical charge.An ion consisting of a single atom is an …
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A field which implements computers to model and study chemical systems and chemical behavior, usually by approximating the Schrodinger equation for a given chemical system.
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Questions regarding chemical and lab safety. This includes questions about proper lab procedure, safe chemical handling, and such.
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The purposeful execution of chemical reactions to obtain a desired product.
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The naming of molecules and elements, usually according to IUPAC standards, but also the accepted uses of traditional ones.
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a measure of how acidic or base an aqueous substance is.
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For questions seeking generalised answers deduced from or composed of theories regarding the chemical reactions involved.
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a subatomic particle with a negative elementary electric charge.
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In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.
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In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid.
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For questions relating to energy required for or produced by reactions, including questions of endothermicity/exothermicity, bond enthalpy, etc.
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The branch of chemistry concerned with identifying and quantifying the chemical constituents of matter.
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the study of the interactions between matter and radiated energy. Experimentally, the results are returned as a function of wavelength versus amplitude (intensity), where the spectral …
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This general tag should be used if the question is about a specific (set of) reaction(s). It should be specified with other tags like stoichiometry, inorganic-chemistry, organic-cemistry, acid-base, .…