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.

Type to find tags:
× 1849
a branch of chemistry that deals with organic molecules. Organic molecules generally have C-H or C-C bonds.
× 1197
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…
× 921
The study of chemical systems using the laws and concepts of physics. This usually requires the techniques of thermodynamics, statistical mechanics and quantum mechanics.
× 818
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.
× 621
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 …
× 524
Applications of chemistry to reagents and reactions of everyday life. This tag should not be applied to questions which are just about simple chemistry but it is specific to questions about chemistry …
× 514
Questions relating to heat and its relation to other forms of energy in chemistry.
× 476
The detailed and complete as possible description of plausible or observable pathways leading from reactants to products of a chemical process. This tag should be applied to questions, which seek info…
× 356
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…
× 348
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…
× 301
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, .…
× 300
the portmanteau of reduction and oxidation and therefore refers to reactions in which electrons are transferred and in consequence the oxidation state of the involved elements changes.
× 293
The state in which both reactants and products are present at concentrations which have no further tendency to change with time.
× 288
The scientific study of chemical processes in living organisms, including, but not limited to, living matter.
× 283
For questions relating to water (H2O), specifically its structure, properties, and uses in chemistry.
× 247
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…
× 239
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.
× 225
For questions relating to compounds dissolved in water and resulting reactions.
× 199
The naming of molecules and elements, usually according to IUPAC standards, but also the accepted uses of traditional ones.
× 198
For questions related to the solubility of compounds in various solvents, especially in water.
× 190
The study of rates and steps (mechanisms) of chemical processes.
× 183
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…
× 183
The purposeful execution of chemical reactions to obtain a desired product.
× 181
Smallest particle still characterizing a chemical element. It consists of a nucleus of a positive charge, carrying almost all its mass and electrons determining its size. This tag should be applied to…
× 177
An electrically neutral entity consisting of more than one atom (n > 1). Rigorously, a molecule, in which n > 1 must correspond to a depression on the potential energy surface that is deep enough to …
× 177
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 …
× 174
a measure of how acidic or base an aqueous substance is.
× 174
The branch of chemistry concerned with identifying and quantifying the chemical constituents of matter.
× 170
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.
× 170
should be applied to questions dealing with solutions of any kind. A solution is liquid or solid phase containing more than one substance, when for convenience one (or more) substance(s), whi…
× 161
For questions relating to energy required for or produced by reactions, including questions of endothermicity/exothermicity, bond enthalpy, etc.
× 160
a subatomic particle with a negative elementary electric charge.
× 160
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid.
× 160
A small-scale experiment which can be undertaken with reagents readily available around the house, while observing standard laboratory safety principles and practices
× 160
Questions regarding chemical and lab safety. This includes questions about proper lab procedure, safe chemical handling, and such.
× 155
Physical and chemical laws describing the properties and behavior of gases.