Search results for “pH”

Nucleophile Organic Chemistry Dimensionless An electron-rich species that donates a pair of electrons to form a new covalent bond. Nu⁻ or Nu:

Nucleophilic Substitution Organic Chemistry Dimensionless A reaction in which a nucleophile replaces a leaving group attached to a saturated carbon. Nu⁻ + R–X → R–Nu + X⁻

Neutral Salt Acids, Bases & Salts Dimensionless A salt whose aqueous solution has a pH of 7 because neither of its ions hydrolyses appreciably.

Nucleotide Biochemistry & Polymer Chemistry Dimensionless The monomer of nucleic acids, consisting of a nitrogenous base, a five-carbon sugar and a phosphate group.

Nernst Equation Electrochemistry & Redox V The equation relating a cell's potential to the concentrations of the species involved. E = E° − (RT/nF) ln Q

Neutral Solution Acids, Bases & Salts mol/L A solution in which the concentrations of hydrogen and hydroxide ions are exactly equal. [H⁺] = [OH⁻] = √Kw

Node Atomic Structure & Periodicity Dimensionless A region within an orbital where the probability of finding an electron falls to zero. total nodes = n − 1

Nuclear Cross Section Nuclear & Radiochemistry barn A measure of the probability that a particular nuclear reaction will occur between a nucleus and an incident particle. σ, measured in barns

Nucleic Acid Biochemistry & Polymer Chemistry Dimensionless A biopolymer of nucleotides that stores and transmits genetic information.

Nuclide Nuclear & Radiochemistry Dimensionless A distinct species of atom characterised by a specific number of protons and neutrons in its nucleus. ᴬ_Z X

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

Results for “pH”