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:
× 945
a branch of chemistry that deals with organic molecules. Organic molecules generally have C-H or C-C bonds.
× 643
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…
× 546
The study of chemical systems using the laws and concepts of physics. This usually requires the techniques of thermodynamics, statistical mechanics and quantum mechanics.
× 468
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.
× 341
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 …
× 328
Applications of chemistry to reagents and reactions of everyday life.
× 298
Questions relating to heat and its relation to other forms of energy in chemistry.
× 264
The step by step sequence of elementary reactions by which overall chemical change occurs.
× 207
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…
× 199
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…
× 182
Reduction-oxidation reactions: all chemical reactions in which atoms have their oxidation state changed.
× 175
The state in which both reactants and products are present at concentrations which have no further tendency to change with time.
× 164
The scientific study of chemical processes in living organisms, including, but not limited to, living matter.
× 156
For questions relating to water (H2O), specifically its structure, properties, and uses in chemistry.
× 142
the subfield of quantum mechanics. Like the parent it focuses on physical phenomenon that occur at an atomic scale, usually specifically aiming at chemical reactions.
× 123
For questions relating to compounds dissolved in water and resulting reactions.
× 122
an electrically neutral group of two or more atoms held together by covalent chemical bonds
× 116
The study of rates and steps (mechanisms) of chemical processes.
× 114
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…
× 111
For questions related to the solubility of compounds in various solvents, especially in water.
× 110
A small-scale experiment which can be undertaken with reagents readily available around the house, while observing standard laboratory safety principles and practices
× 106
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 …
× 105
A basic unit of matter that consists of a dense central nucleus surrounded by a cloud of negatively charged electrons.
× 103
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.
× 102
Questions regarding chemical and lab safety. This includes questions about proper lab procedure, safe chemical handling, and such.
× 101
The naming of molecules and elements, usually according to IUPAC standards, but also the accepted uses of traditional ones.
× 99
The purposeful execution of chemical reactions to obtain a desired product.
× 99
For questions seeking generalised answers deduced from or composed of theories regarding the chemical reactions involved.
× 97
a measure of how acidic or base an aqueous substance is.
× 96
a subatomic particle with a negative elementary electric charge.
× 94
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.
× 93
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid.
× 89
For questions relating to energy required for or produced by reactions, including questions of endothermicity/exothermicity, bond enthalpy, etc.
× 89
The branch of chemistry concerned with identifying and quantifying the chemical constituents of matter.
× 89
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 …
× 80
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, .…