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NIST Physical Measurement Laboratory. Institutional isotope mass data. Webpage publication date unestablished.

Institutional table from National Institute of Standards and Technology. Undated; cited magnesium-24, magnesium-25 and magnesium-26 neutral-mass and reference-composition rows.

The 2014 adjustment gives the historical Planck constant, elementary charge and electron mass used for numerical evaluation. These are external reference values, without a claim about the exam handbook's rounding.

NIST/CODATA. Institutional fundamental-constant wall chart.

Issued by National Institute of Standards and Technology.

Publisher: National Institute of Standards and Technology.

This source is credited to an organization.

Online text: physics.nist.gov/cgi-bin/cuu/Value?me%7Csearch_for=mass+of+electron

Cited passages: CODATA electron mass: numerical value and 2022 adjustment label.

By National Institute of Standards and Technology.

Publisher: National Institute of Standards and Technology.

This source is credited to an organization.

The NIST table identifies the2s²2p² ground configuration with³P₀ lowest and lists its³P,¹D and¹S levels. This is atomic reference data, not a worked examination answer set.

The ground level is listed as $3d^5({}^{6}S)4sa{}^7{S}_3$ at zero wavenumber. This supports the chromium configuration and term symbol; it is not a worked solution to the Cambridge exam.

By National Institute of Standards and Technology. Handbook of Basic Atomic Spectroscopic Data, neutral helium He I table.

The table provides ground, singlet and triplet excitation energies as spectroscopic wavenumbers, and the He II ground-state ionization limit. Multiply by $hc$ with consistent inverse-length units to obtain excitation energy.

By National Institute of Standards and Technology. Handbook of Basic Atomic Spectroscopic Data, neutral oxygen O I table.

The first configuration block specifies $2s^{2}2p^4{}^3{P}_2$ as the zero-energy level, followed by its $J=1,0$ fine-structure partners.

A tabulation of Ca II configurations, terms, J values and level energies, including the common Ca III ionization limit. It independently verifies the level assignments used for the optical and infrared series.

The gas-phase fundamental entries include C=O stretch $1746$, symmetric C–H stretch $2783$, antisymmetric C–H stretch $2843$, and wag $1167\mathrm{c}{\mathrm{m}}^{-1}$, with the $C_{2v}$ labels used in the exam. The listed fundamentals provide an independent assignment check, rather than a solution source.

By National Institute of Standards and Technology, CODATA.

Publisher: National Institute of Standards and Technology.

Online text: physics.nist.gov/cuu/Constants/Table/allascii.txt

Cited passages: 2022 CODATA complete listing: electron volt, elementary charge and Avogadro constant.

Cited passages: NIST's current constants table, 2022 CODATA adjustment: vacuum electric permittivity; NIST, 2022 CODATA complete table: Newtonian constant of gravitation and its standard uncertainty; NIST, 2022 CODATA constants; NIST, CODATA constants: Wien displacement law constants.

Cited passages: Current adjustment heading, next-adjustment notice and data-content update.

Cited row: $3d^{7}4s^{2}a{}^4{F}_{9/2}$ at zero spectroscopic wavenumber. This is a measured atomic-level compilation, not an answer set for any examination.

Cited row: $3d^{10}({}^{1}S)4s{}^2{S}_{1/2}$ at zero spectroscopic wavenumber. The table distinguishes the neutral atom from the closed-shell copper(I) ion.

By National Institute of Standards and Technology.

Publisher: National Institute of Standards and Technology.

Online text: cccbdb.nist.gov/exp2x.asp?casno=7647010&charge=0

Cited passages: HCl, “Vibration specific dipole moments”: equilibrium 1.093 D and vibrational level 0, 1.109 D.

The helium-4 characteristic-property table gives a normal boiling point of 4.224 K and a critical temperature of 5.2 K.

Official data and fitted coefficients: trc.nist.gov/cryogenics/materials/OFHC%20Copper/OFHC_Copper_rev1.htm

The specific-heat correlation covers 4–300 K and gives mass-specific heat capacity in $\mathrm{J}\mathrm{k}{\mathrm{g}}^{-1}{\mathrm{K}}^{-1}$. Its stated fit deviation is 10% below 15 K. The page distinguishes specific heat from its separate thermal conductivity correlation.

Issued by National Institute of Standards and Technology.

Publisher: National Institute of Standards and Technology.

This source is credited to an organization.

Online text: www.nist.gov/pml/sensor-science/thermodynamic-metrology/mercury-thermometer-alternatives/mercury-thermometer-1

Cited passages: Platinum Resistance Thermometers, opening explanation: SPRTs as ITS-90 interpolation tools; Platinum Resistance Thermometers, opening explanation: conventional 100-ohm element at 0 °C.

Page created 14 December 2011; updated 16 April 2024. The creation timestamp is not an independently established first-publication date.