Search results for “pH”

Central Metal Atom Inorganic & Coordination Chemistry Dimensionless The metal atom or ion at the heart of a coordination entity, which accepts electron pairs from the ligands.

Chalcogens Atomic Structure & Periodicity Dimensionless The group 16 elements — oxygen, sulfur, selenium, tellurium and polonium — collectively known as the ore-forming elements. ns² np⁴

Cloud Chamber Nuclear & Radiochemistry Dimensionless A device that reveals the paths of ionising particles as visible trails of condensed vapour.

Core Electron Atomic Structure & Periodicity Dimensionless An electron occupying a completely filled inner shell that does not take part in chemical bonding.

Corrosion Electrochemistry & Redox mm/year The gradual destruction of a metal by electrochemical reaction with its environment.

Coupled Reactions Thermochemistry & Thermodynamics kJ/mol Two reactions linked through a shared intermediate so that a favourable one drives an unfavourable one. ΔG_total = ΔG₁ + ΔG₂ < 0

Diagonal Relationship Atomic Structure & Periodicity Dimensionless The similarity in properties between an element of period 2 and the element one place to its lower right in period 3.

Element Foundations of Chemistry Dimensionless A pure substance composed entirely of atoms that share the same atomic number and therefore cannot be split into simpler substances by chemical means.

End Point Acids, Bases & Salts mL The point in a titration at which the indicator changes colour, signalling that the reaction is judged complete.

Endothermic Reaction Stoichiometry & Chemical Reactions kJ/mol A reaction that absorbs energy from the surroundings, giving a positive enthalpy change. ΔH > 0

f-Block Elements Atomic Structure & Periodicity Dimensionless The lanthanides and actinides, in which electrons fill the f orbitals of the antepenultimate shell. (n−2)f¹⁻¹⁴

First-Order Reaction Chemical Kinetics & Catalysis s⁻¹ A reaction whose rate is directly proportional to the concentration of a single reactant. ln[A] = ln[A]₀ − kt

Free Radical Chain Mechanism Chemical Kinetics & Catalysis Dimensionless A chain mechanism in which the propagating intermediates are species bearing unpaired electrons. X· + RH → HX + R·

Frenkel Defect States of Matter & Gas Laws Dimensionless A point defect in which an ion leaves its lattice site and lodges in a nearby interstitial position.

Froth Flotation Inorganic & Coordination Chemistry Dimensionless A concentration method that separates minerals by exploiting differences in how readily their surfaces are wetted.

Glucose Biochemistry & Polymer Chemistry g/mol The most abundant monosaccharide and the primary energy source for most living cells. C₆H₁₂O₆

Hydration Reaction Stoichiometry & Chemical Reactions Dimensionless The addition of water across a multiple bond or the incorporation of water into a crystal lattice. C=C + H₂O → C(OH)–CH

ICE Table Chemical Equilibrium mol/L A systematic tabulation of Initial, Change and Equilibrium amounts used to solve equilibrium problems.

Immiscible Liquids Solutions & Colligative Properties Dimensionless Two liquids that do not dissolve in one another and separate into distinct layers.

Metalloid Atomic Structure & Periodicity Dimensionless An element with properties intermediate between those of metals and non-metals, lying along the periodic table's staircase.

Moderator Nuclear & Radiochemistry Dimensionless A material used in a reactor to slow fast neutrons to energies at which fission is far more probable.

Nitrile Organic Chemistry Dimensionless A compound containing a carbon–nitrogen triple bond. R–C≡N

Nucleus Atomic Structure & Periodicity m The dense, positively charged core of an atom, containing virtually all of its mass in protons and neutrons. r ≈ 1.2 × A^(1/3) fm

Odd-Electron Molecule Chemical Bonding & Molecular Structure Dimensionless A species containing an unpaired electron, so that its total electron count is odd and no octet structure is possible.

Results for “pH”