120 relations: Actinide, Actinium, Alnico, Antiferromagnetism, Atomic orbital, Aufbau principle, Autocatalysis, Block (periodic table), Bohrium, Boiling point, Cadmium, Calcium, Catalysis, Centrosymmetry, Charge-transfer complex, Chemical element, Chromate and dichromate, Chromium, Cobalt, Cohesion (chemistry), Contact process, Copernicium, Copper, Covalent bond, Crystal field theory, Darmstadtium, Degenerate energy levels, Density, Diamagnetism, Dubnium, Electron configuration, Electron shell, F. Albert Cotton, Ferromagnetism, Gallium, Geoffrey Wilkinson, Gold, Group (periodic table), Group 10 element, Group 11 element, Group 12 element, Group 3 element, Group 4 element, Group 5 element, Group 6 element, Group 7 element, Group 8 element, Group 9 element, Haber process, Hafnium, ..., Hassium, Hydrogenation, International Union of Pure and Applied Chemistry, Ion, Iridium, Iron, Irving–Williams series, Lanthanide, Lanthanum, Laporte rule, Ligand, Ligand field theory, Main-group element, Manganese, Meitnerium, Melting point, Mercury (element), Mercury(II) iodide, Mercury(IV) fluoride, Metal, Metal carbonyl, Metallic bonding, Molar attenuation coefficient, Molar concentration, Molecular vibration, Molybdenum, Nanomaterial-based catalyst, Nickel, Niobium, Nitric oxide, Octet rule, Osmium, Oxalic acid, Oxidation state, Oxygen, Palladium, Paramagnetism, Period 4 element, Period 5 element, Period 6 element, Period 7 element, Periodic table, Permanganate, Platinum, Post-transition metal, Potassium permanganate, Radical (chemistry), Rhenium, Rhodium, Roentgenium, Ruthenium, Rutherfordium, Scandium, Seaborgium, Selection rule, Silver, Spin states (d electrons), Tanabe–Sugano diagram, Tantalum, Technetium, Titanium, Tungsten, Valence electron, Vanadium, Vibronic coupling, Visible spectrum, Yttrium, Zinc, Zirconium, 18-electron rule. Expand index (70 more) » « Shrink index
The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.
Actinium is a chemical element with symbol Ac and atomic number 89.
Alnico is an acronym referring to a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni) and cobalt (Co), hence al-ni-co.
In materials that exhibit antiferromagnetism, the magnetic moments of atoms or molecules, usually related to the spins of electrons, align in a regular pattern with neighboring spins (on different sublattices) pointing in opposite directions.
In quantum mechanics, an atomic orbital is a mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom.
The aufbau principle states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels.
A single chemical reaction is said to be autocatalytic if one of the reaction products is also a catalyst for the same or a coupled reaction.
A block of the periodic table of elements is a set of adjacent groups.
Bohrium is a synthetic chemical element with symbol Bh and atomic number 107.
The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.
Cadmium is a chemical element with symbol Cd and atomic number 48.
Calcium is a chemical element with symbol Ca and atomic number 20.
Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalysthttp://goldbook.iupac.org/C00876.html, which is not consumed in the catalyzed reaction and can continue to act repeatedly.
In crystallography, a point group which contains an inversion center as one of its symmetry elements is centrosymmetric.
A charge-transfer complex (CT complex) or electron-donor-acceptor complex is an association of two or more molecules, or of different parts of one large molecule, in which a fraction of electronic charge is transferred between the molecular entities.
A chemical element is a species of atoms having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z).
Chromate salts contain the chromate anion,.
Chromium is a chemical element with symbol Cr and atomic number 24.
Cobalt is a chemical element with symbol Co and atomic number 27.
Cohesion (from Latin cohaesiō "cling" or "unity") or cohesive attraction or cohesive force is the action or property of like molecules sticking together, being mutually attractive.
The contact process is the current method of producing sulfuric acid in the high concentrations needed for industrial processes.
Copernicium is a synthetic chemical element with symbol Cn and atomic number 112.
Copper is a chemical element with symbol Cu (from cuprum) and atomic number 29.
A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms.
Crystal Field Theory (CFT) is a model that describes the breaking of degeneracies of electron orbital states, usually d or f orbitals, due to a static electric field produced by a surrounding charge distribution (anion neighbors).
Darmstadtium is a synthetic chemical element with symbol Ds and atomic number 110.
In quantum mechanics, an energy level is degenerate if it corresponds to two or more different measurable states of a quantum system.
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force.
Dubnium is a synthetic chemical element with symbol Db and atomic number 105.
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.
In chemistry and atomic physics, an electron shell, or a principal energy level, may be thought of as an orbit followed by electrons around an atom's nucleus.
Frank Albert Cotton (April 9, 1930 – February 20, 2007) was an American chemist.
Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets.
Gallium is a chemical element with symbol Ga and atomic number 31.
Sir Geoffrey Wilkinson FRS (14 July 1921 – 26 September 1996) was a Nobel laureate English chemist who pioneered inorganic chemistry and homogeneous transition metal catalysis.
Gold is a chemical element with symbol Au (from aurum) and atomic number 79, making it one of the higher atomic number elements that occur naturally.
In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements.
Group 10, numbered by current IUPAC style, is the group of chemical elements in the periodic table that consists of nickel (Ni), palladium (Pd), platinum (Pt), and perhaps also the chemically uncharacterized darmstadtium (Ds).
Group 11, by modern IUPAC numbering, is a group of chemical elements in the periodic table, consisting of copper (Cu), silver (Ag), and gold (Au).
Group 12, by modern IUPAC numbering, is a group of chemical elements in the periodic table.
Group 3 is a group of elements in the periodic table.
Group 4 is a group of elements in the periodic table.
Group 5 (by IUPAC style) is a group of elements in the periodic table.
Group 6, numbered by IUPAC style, is a group of elements in the periodic table.
Group 7, numbered by IUPAC nomenclature, is a group of elements in the periodic table.
Group 8 is a group of chemical element in the periodic table.
Group 9, numbered by IUPAC nomenclature, is a group of chemical element in the periodic table.
The Haber process, also called the Haber–Bosch process, is an artificial nitrogen fixation process and is the main industrial procedure for the production of ammonia today.
Hafnium is a chemical element with symbol Hf and atomic number 72.
Hassium is a synthetic chemical element with symbol Hs and atomic number 108.
Hydrogenation – to treat with hydrogen – is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum.
The International Union of Pure and Applied Chemistry (IUPAC) is an international federation of National Adhering Organizations that represents chemists in individual countries.
An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).
Iridium is a chemical element with symbol Ir and atomic number 77.
Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.
The Irving-Williams Series refers to the relative stabilities of complexes formed by transition metals.
The lanthanide or lanthanoid series of chemical elements comprises the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium.
Lanthanum is a chemical element with symbol La and atomic number 57.
The Laporte rule is a spectroscopic selection rule that only applies to centrosymmetric molecules (those with an inversion centre) and atoms.
In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex.
Ligand field theory (LFT) describes the bonding, orbital arrangement, and other characteristics of coordination complexes.
In chemistry and atomic physics, the main group is the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements.
Manganese is a chemical element with symbol Mn and atomic number 25.
Meitnerium is a synthetic chemical element with symbol Mt and atomic number 109.
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid at atmospheric pressure.
Mercury is a chemical element with symbol Hg and atomic number 80.
Mercury(II) iodide is a chemical compound with the molecular formula HgI2.
Mercury(IV) fluoride, HgF4, is the first mercury compound to be reported with mercury in the oxidation state IV.
A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard when in solid state, opaque, shiny, and has good electrical and thermal conductivity.
Metal carbonyls are coordination complexes of transition metals with carbon monoxide ligands.
Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions.
The molar attenuation coefficient is a measurement of how strongly a chemical species attenuates light at a given wavelength.
Molar concentration (also called molarity, amount concentration or substance concentration) is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.
A molecular vibration occurs when atoms in a molecule are in periodic motion while the molecule as a whole has constant translational and rotational motion.
Molybdenum is a chemical element with symbol Mo and atomic number 42.
Nanomaterial-based catalysts are usually heterogeneous catalysts broken up into metal nanoparticles in order to speed up the catalytic process.
Nickel is a chemical element with symbol Ni and atomic number 28.
Niobium, formerly known as columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41.
Nitric oxide (nitrogen oxide or nitrogen monoxide) is a colorless gas with the formula NO.
The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electron configuration as a noble gas.
Osmium (from Greek ὀσμή osme, "smell") is a chemical element with symbol Os and atomic number 76.
Oxalic acid is an organic compound with the formula C2H2O4.
The oxidation state, sometimes referred to as oxidation number, describes degree of oxidation (loss of electrons) of an atom in a chemical compound.
Oxygen is a chemical element with symbol O and atomic number 8.
Palladium is a chemical element with symbol Pd and atomic number 46.
Paramagnetism is a form of magnetism whereby certain materials are weakly attracted by an externally applied magnetic field, and form internal, induced magnetic fields in the direction of the applied magnetic field.
A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements.
A period 5 element is one of the chemical elements in the fifth row (or period) of the periodic table of the elements.
A period 6 element is one of the chemical elements in the sixth row (or period) of the periodic table of the elements, including the lanthanides.
A period 7 element is one of the chemical elements in the seventh row (or period) of the periodic table of the chemical elements.
The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties, whose structure shows periodic trends.
A permanganate is the general name for a chemical compound containing the manganate(VII) ion,.
Platinum is a chemical element with symbol Pt and atomic number 78.
Post-transition metals are a set of metallic elements in the periodic table located between the transition metals to their left, and the metalloids to their right.
Potassium permanganate is an inorganic chemical compound and medication.
In chemistry, a radical (more precisely, a free radical) is an atom, molecule, or ion that has an unpaired valence electron.
Rhenium is a chemical element with symbol Re and atomic number 75.
Rhodium is a chemical element with symbol Rh and atomic number 45.
Roentgenium is a chemical element with symbol Rg and atomic number 111.
Ruthenium is a chemical element with symbol Ru and atomic number 44.
Rutherfordium is a synthetic chemical element with symbol Rf and atomic number 104, named after physicist Ernest Rutherford.
Scandium is a chemical element with symbol Sc and atomic number 21.
Seaborgium is a synthetic chemical element with symbol Sg and atomic number 106.
In physics and chemistry, a selection rule, or transition rule, formally constrains the possible transitions of a system from one quantum state to another.
Silver is a chemical element with symbol Ag (from the Latin argentum, derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47.
Spin states when describing transition metal coordination complexes refers to the potential spin configurations of the metal center's d electrons.
Tanabe–Sugano diagrams are used in coordination chemistry to predict absorptions in the UV, visible and IR electromagnetic spectrum of coordination compounds.
Tantalum is a chemical element with symbol Ta and atomic number 73.
Technetium is a chemical element with symbol Tc and atomic number 43.
Titanium is a chemical element with symbol Ti and atomic number 22.
Tungsten, or wolfram, is a chemical element with symbol W (referring to wolfram) and atomic number 74.
In chemistry, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Vanadium is a chemical element with symbol V and atomic number 23.
Vibronic coupling (also called nonadiabatic coupling or derivative coupling) in a molecule involves the interaction between electronic and nuclear vibrational motion.
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
Yttrium is a chemical element with symbol Y and atomic number 39.
Zinc is a chemical element with symbol Zn and atomic number 30.
Zirconium is a chemical element with symbol Zr and atomic number 40.
The 18-electron rule is a rule used primarily for predicting and rationalizing formulae for stable metal complexes, especially organometallic compounds.
D-block element, First transition series, First-row transition metal, Metal Oxidation States, Metal oxidation states, Transition Element, Transition Metal, Transition Metals, Transition element, Transition elements, Transition metal catalyst, Transition metals, Transition-metal, Transition-metal catalyst, Transitional metal, Transitional metals.