crc handbook of chemistry and physics

[...]... Web site of the NIST Physics Laboratory (Reference 5) REFERENCES 1 Holden, N E., “Table of the Isotopes”, in Lide, D R., Ed., CRC Handbook of Chemistry and Physics, 82nd Ed., CRC Press, Boca Raton FL, 2001 2 Audi, G., and Wapstra, A H., Nucl Phys., A595, 409, 1995 3 Rosman, K J R., and Taylor, P D P., J Phys Chem Ref Data, 27, 1275, 1998 4 R D Vocke (for IUPAC Commission on Atomic Weights and Isotopic... 0.65 and 3.2 K, the ITS-90 is defined by the vapor pressure-temperature relation of 3He, and between 1.25 and 2.1768 K (the λ point) and between 2.1768 and 5.0 K by the vapor pressure-temperature relations of 4He T90 is defined by the vapor pressure equations of the form: 9 [( ) T90 / K = A0 + ∑ Ai ln( p/ Pa ) – B / C i =1 ] i The values of the coefficients Ai, and of the constants Ao, B, and C of the... numerical value of F to be used in coulometric chemical measurements is 96 485.3432(76) [7.9×10−8 ] when the relevant current is measured in terms of representations of the volt and ohm based on the Josephson and quantum Hall effects and the internationally adopted conventional values of the Josephson and von Klitzing constants K J−90 and RK−90 given in the “Adopted values” table h The entropy of an ideal... question will be on the agenda of the 20th CGPM, October 1995), the SI will consist of only two classes of units: base units and derived units, with the radian and steradian subsumed into the class of derived units of the SI (The option of using or not using them in expressions for SI derived units, as is convenient, would remain unchanged.) 4 Decimal multiples and submultiples of SI units: SI prefixes Table... Resolution 12 of the 11th CGPM, which established the SI in 1960 , did not specify the nature of the supplementary units The interpretation is based on two principal considerations: that plane angle is generally expressed as the ratio of two lengths and solid angle as the ratio of an area and the square of a length, and are thus quantities of dimension one (so-called dimensionless quantities); and that... difference of 1 V in vacuum; 1 eV = 1.602 177 33ϫ10Ϫ19 J with a combined standard uncertainty of 0.000 000 49ϫ10Ϫ19 J The unified atomic mass unit is equal to 1/12 of the mass of an atom of the nuclide 12 C; 1 u = 1.660 540 2ϫ 10Ϫ27 kg with a combined standard uncertainty of 0.000 001 0ϫ10Ϫ27 kg (b) 5.1.4 Natural and atomic units In some cases, particularly in basic science, the values of quantities... hc/λ = hν = kT , and based on the 1998 CODATA adjustment of the values of the constants; 1 1 eV = (e/C) J, 1 u = m u = 12 m(12 C) = 10−3 kg mol−1/NA , and E h = 2R∞ hc = α 2 m e c2 is the Hartree energy (hartree) STANDARD ATOMIC WEIGHTS (2001) This table of atomic weights includes the changes made in 1999 and 2001 by the IUPAC Commission on Atomic Weights and Isotopic Abundances The Standard Atomic Weights... W C., Musgrove, A., and Kotochigova, S., Ground Levels and Ionization Energies for Neutral Atoms, Web Version 1.2.2, http:// physics. nist.gov/IonEnergy, National Institute of Standards and Technology, Gaithersburg, MD, December 2002 1-20 INTERNATIONAL TEMPERATURE SCALE OF 1990 (ITS-90) B W Mangum A new temperature scale, the International Temperature Scale of 1990 (ITS-90), was officially adopted by... Ϫ1 ), and the SI units of absorbed dose and dose equivalent are designated as the gray (Gy) and the sievert (Sv), respectively, rather than the joule per kilogram (J/kg) 3 SI supplementary units As previously stated, there are two units in this class: the radian, symbol rad, the SI unit of the quantity plane angle; and the steradian, symbol sr, the SI unit of the quantity solid angle Definitions of these... (–259.3467°C) and 1234.93 K (961.78°C), the ITS-90 is defined in terms of the specified fixed points given below, by resistance ratios of platinum resistance thermometers obtained by calibration at specified sets of the fixed points, and by reference functions and deviation functions of resistance ratios which relate to T90 between the fixed points 4 Above 1234.93 K, the ITS-90 is defined in terms of Planck’s . NIST Physics Laboratory (Reference 5). REFERENCES 1. Holden, N. E ., “Table of the Isotopes , in Lide, D. R. , Ed. , CRC Handbook of Chemistry and Physics, 82nd Ed. , CRC Press, Boca Raton FL, 2001. 2 Griffiths, and Lawrence Braschi, who participated in drawing the structures. David R. Lide October 2 7, 2003 This Edition is dedicated to my grandchildren: Mary Eleanor Lide David Alston Lide, . Rd. Bethesda, Maryland 20816 H. P. R. Frederikse 9625 Dewmar Lane Kensington, Maryland 20895 J .R. Fuhr Atomic Physics Division National Institute of Standards and Technology Gaithersburg, Maryland