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Parent topics

Chemistry [r]: The science of matter, or of the electrical or electrostatical interactions of matter. ^[e]
Chemical elements [r]: In one sense, refers to species or types of atoms, each species/type distinguished by the number of protons in the nuclei of the atoms belonging to the species/type, each species/type having a unique number of nuclear protons; in another sense, refers to substances, or pieces of matter, each composed of multiple atoms solely of a single species/type. ^[e]
Periodic table of elements [r]: A tabular method of displaying the chemical elements. ^[e]
Heavy metal [r]: A member of an ill-defined subset of elements that exhibit metallic properties with relatively high atomic mass and density, some of which includes the transition metals, metalloids, lanthanides, and actinides. ^[e]

Subtopics

Atom (science) [r]: The defining unit of chemical elements. ^[e]
Atomic electron configuration [r]: A specification of the occupation of an atom's electron orbitals by electrons. ^[e]
Atomic mass [r]: The mass of an atom expressed in unified atomic mass units (u) and formerly known as atomic weight. ^[e]
Atomic number [r]: The number of protons in the nucleus of a single atom of a chemical element. ^[e]
Atomic radius [r]: A measure of the size of an atom, usually the distance from the nucleus to the boundary of the surrounding cloud of electrons. ^[e]
Catalog of magnetic nuclei [r]: Add brief definition or description
Chemical thermodynamics [r]: The study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. ^[e]
Density (chemistry) [r]: A measure of the mass per unit volume of a gas, liquid or solid. ^[e]
Electron configuration [r]: The arrangement of electrons of an atom, a molecule, or other physical structure, distributed in the orbitals of the given system. ^[e]
Half-life [r]: The amount of time needed for one half of any reactant subject to first-order decomposition to decay. ^[e]
Isotope [r]: An atom of a chemical element with a specific number of neutrons and hence a specific nuclear mass, such as carbon-14 (¹⁴C). ^[e]
Nuclear reactions [r]: The process in which two nuclei or nuclear particles collide to produce products different from the initial particles. ^[e]
Oxidation state [r]: A measure of the degree of oxidation of an atom in a substance. ^[e]
Radiation chemistry [r]: A subdivision of nuclear chemistry, which is the study of the chemical effects of radiation on matter. ^[e]
Radiochemistry [r]: The chemistry of radioactive materials ^[e]
Radiographic equipment [r]: Equipment used for radiographic work, both medical and industrial. ^[e]
Refineries [r]: Industrial manufacturing facilities composed of a group of chemical engineering unit processes and unit operations used for the conversion certain raw materials such as petroleum crude oil, mined ores, sugar or salt into finished products of value or for the refining and purification of partially converted raw materials into finished products. ^[e]

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