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Results for “pH”

12 terms


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Filtering by: pH Starts with N Clear all
Organic Chemistry

Nucleophile

An electron-rich species that donates a pair of electrons to form a new covalent bond.

Nu⁻ or Nu: Dimensionless
Organic Chemistry

Nucleophilic Substitution

A reaction in which a nucleophile replaces a leaving group attached to a saturated carbon.

Nu⁻ + R–X → R–Nu + X⁻ Dimensionless
Acids, Bases & Salts

Neutral Salt

A salt whose aqueous solution has a pH of 7 because neither of its ions hydrolyses appreciably.

Dimensionless
Biochemistry & Polymer Chemistry

Nucleotide

The monomer of nucleic acids, consisting of a nitrogenous base, a five-carbon sugar and a phosphate group.

Dimensionless
Electrochemistry & Redox

Nernst Equation

The equation relating a cell's potential to the concentrations of the species involved.

E = E° − (RT/nF) ln Q V
Acids, Bases & Salts

Neutral Solution

A solution in which the concentrations of hydrogen and hydroxide ions are exactly equal.

[H⁺] = [OH⁻] = √Kw mol/L
Atomic Structure & Periodicity

Node

A region within an orbital where the probability of finding an electron falls to zero.

total nodes = n − 1 Dimensionless
Nuclear & Radiochemistry

Nuclear Cross Section

A measure of the probability that a particular nuclear reaction will occur between a nucleus and an incident particle.

σ, measured in barns barn
Biochemistry & Polymer Chemistry

Nucleic Acid

A biopolymer of nucleotides that stores and transmits genetic information.

Dimensionless
Nuclear & Radiochemistry

Nuclide

A distinct species of atom characterised by a specific number of protons and neutrons in its nucleus.

ᴬ_Z X Dimensionless
Organic Chemistry

Nitrile

A compound containing a carbon–nitrogen triple bond.

R–C≡N Dimensionless
Atomic Structure & Periodicity

Nucleus

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 m