scholarly journals relative atomic mass (atomic weight), Ar

2008 ◽  
Keyword(s):  
Atomic Weight ◽  
Atomic Mass ◽  
Relative Atomic Mass

Atomic weights of the elements 1999 (IUPAC Technical Report)

2001 ◽  
Vol 73 (4) ◽  
pp. 667-683 ◽  
Author(s):  
Tyler B. Coplen
Keyword(s):  
Isotopic Composition ◽  
Scientific Community ◽  
Atomic Weight ◽  
Atomic Mass ◽  
Isotopic Abundance ◽  
Technical Report ◽  
Relative Atomic Mass ◽  
Isotopic Abundances

The biennial review of atomic-weight, Ar(E), determinations and other cognate data have resulted in changes for the standard atomic weights of the following elements: elementFromTonitrogen14.006 74 ± 0.000 0714.0067 ± 0.0002 sulfur32.066 ± 0.00632.065 ± 0.005 chlorine35.4527 ± 0.000935.453 ± 0.002germanium72.61 ± 0.0272.64 ± 0.01 xenon131.29 ± 0.02131.293 ± 0.006 erbium167.26 ± 0.03167.259 ± 0.003 uranium238.0289 ± 0.0001238.028 91 ± 0.000 03 Presented are updated tables of the standard atomic weights and their uncertainties estimated by combining experimental uncertainties and terrestrial variabilities. In addition, this report again contains an updated table of relative atomic-mass values and half-lives of selected radioisotopes. Changes in the evaluated isotopic abundance values from those published in 1997 are so minor that an updated list will not be published for the year 1999.Many elements have a different isotopic composition in some nonterrestrial materials. Some recent data on parent nuclides that might affect isotopic abundances or atomic-weight values are included in this report for the information of the interested scientific community.

scholarly journals Standard Atomic Weight of Lead Revised

2021 ◽  
Vol 43 (3) ◽  
pp. 30-30
Keyword(s):  
Isotopic Composition ◽  
Atomic Weight ◽  
Atomic Mass ◽  
Lead Isotopic Composition ◽  
Technical Report ◽  
Relative Atomic Mass ◽  
Isotopic Abundances ◽  
Iupac Commission

Abstract Following the recent publication of the IUPAC Technical Report on the variation of lead isotopic composition and atomic weight in terrestrial materials [1], the IUPAC Commission on Isotopic Abundances and Atomic Weights (CIAAW) is recommending changes to the standard atomic weight (i.e. relative atomic mass) of lead:

scholarly journals On the atomic masses (weights?) Of the elements

2012 ◽  
Vol 48 (1) ◽  
pp. 153-159 ◽  
Author(s):  
G. Kaptay
Keyword(s):  
Atomic Weight ◽  
Atomic Mass ◽  
Essential Information ◽  
Atomic Masses ◽  
System Of Units

Atomic masses (weights?) is an essential information for mining and metallurgy. The paper discusses four subjects around this problem. First, the classification of all the elements is suggested into 4 classes, based on their isotope features, determining the accuracy of their known atomic masses. As part of that, the class of elements is discussed with uncertain atomic weights in accordance with the 2009 IUPAC recommendations. A better (easier to use) format of atomic weights is presented for this class of elements. Third, it is found not informative to leave empty spaces instead of approximate atomic weights for elements with unstable isotopes. Fourth, the term atomic weight vs the term atomic mass is discussed shortly, in agreement with the SI system of units and in contrary to the questionable IUPAC convection.

Nuclear metamorphosis in mercury

2016 ◽  
Vol 30 (01) ◽  
pp. 1550239
Author(s):  
F. Cardone ◽  
G. Albertini ◽  
D. Bassani ◽  
G. Cherubini ◽  
E. Guerriero ◽  
...  
Keyword(s):  
Solid State ◽  
Gamma Radiation ◽  
Neutron Emission ◽  
Lorentz Invariance ◽  
Atomic Weight ◽  
Space Time ◽  
Atomic Mass ◽  
Aisi 304 ◽  
Aisi 304 Steel ◽  
Local Lorentz Invariance

The conditions of local Lorentz invariance (LLI) breakdown, obtained during neutron emission from a sonicated cylindrical bar of AISI 304 steel, were reproduced in a system made of a mole of mercury. After 3 min, a part of the liquid transformed into solid state material, in which isotopes were found with both higher and lower atomic mass with respect to the starting material. Changes in the atomic weight without production of gamma radiation and radionuclides are made possible by deformed space–time reactions.

A Predicting Method for Thermal Conductivity of Functional Carbide Crystals and Ceramic Materials

2007 ◽  
Vol 280-283 ◽  
pp. 1175-1178
Author(s):  
Qing Ren Wu ◽  
Xiao Ping Wang ◽  
Hua Qing Xie ◽  
Tonggeng Xi
Keyword(s):  
Thermal Conductivity ◽  
Heat Conduction ◽  
Relative Error ◽  
Ceramic Materials ◽  
Prediction Equation ◽  
Atomic Mass ◽  
New Method ◽  
Relative Atomic Mass ◽  
Thermal Conductivities

A new method for predicting the thermal conductivity of functional carbide crystals and ceramics materials is proposed. The effect of average relative atomic mass and density on thermal conductivities of carbide function crystals and ceramics is considered in the method. Correlations are developed for thermal conductivity with average relative atomic mass and density according to the microscope theories of heat conduction. The thermal conductivities calculated from the prediction equation for many functional carbide crystals and ceramics were compared with the measured dada and found to be agreement. It is show that, for the most of functional carbide crystals and ceramics materials, the relative error between the predicting values and the measuring data is ± 20%. It is discovered in further analysis that the larger the average relative atomic mass and density are, the more accurately the thermal conductivities predict.

scholarly journals INSTRUMEN TES ISLAM KIMIA (ITIK) UNTUK MENDETEKSI PEMAHAMAN LEVEL MIKROSKOPIS MATERI AIR

2017 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Asih Widi Wisudawati
Keyword(s):  
High School ◽  
Hydrogen Bonding ◽  
Kinetic Energy ◽  
Research And Development ◽  
Atomic Mass ◽  
Microscopic Level ◽  
Phase Changes ◽  
Relative Atomic Mass ◽  
Level Of Understanding ◽  
Particle Kinetic Energy

The study aims to develop instrument to measurethe level of understanding of students and microscopic level material phase changes of water. The method used is R&D (Research and Development) Borg and Gall, which have procedure were are following step (1) Need assessment/ Plan (2) Design product/ Organization (3) Created product/ implementation. Implementation with one shot design study with samples used a number of 71 students of 10th grade MA Wahid Hasyim and senior high school MBS Yogyakarta. Indicators in the study is the movement and vibration of water particles, the distance between water particles, particle kinetic energy of water, relative atomic mass of water and hydrogen bonding. The results showed an understanding of chemica lmaterial microscopic level is low and spitual attitude as a nurturant effect is high categories. 

scholarly journals Mass and Energy Densities of the Cosmos

2019 ◽  
Author(s):  
Ogaba Philip Obande
Keyword(s):  
Metric Space ◽  
Chemical Elements ◽  
Planck Scale ◽  
Particle Creation ◽  
Physical Constant ◽  
Big Bang ◽  
Atomic Mass ◽  
Vacuum Field ◽  
Newtonian Physics ◽  
Relative Atomic Mass

Fundamental principles of classical (Newtonian) physics are employed to probe the cosmological lambda Λ; it yields the values ρvac = 2.61 x 10-39 g cm-3 and Λ = 4.78 x 10-62. The results reveal that Λ is a fundamental physical constant defined by vacuum density-light speed ρvacc2 correlation. However, the constant accelerates along the groups and periods of a universal spatial periodicity equivalent to the chemical periodicity. Previous results are cited to show that chemical elements are quantum harmonic (periodic) oscillators QHOs and their waveform oscillations exclusively define the vacuum field. A cosmological periodic unit CPU is introduced, it relies on the cosmological principle to argue that a relative physical quantity evaluated for the QHO applies to constituents of corresponding cosmological spatial quanta. Compelling evidences, backed with relevant data and quantitative expressions, are then presented to argue that: there was never a big bang, it is a Linde-universe sans “chaotic”; nature posts no singularity; mass does not curve spacetime, neither does metric space curvature trace directly to gravitation nor particle creation, gravity is classical, not quantum; reality is quadri-phasic not mono-phasic with a clear distinction between the atomic waveform defined with absolute atomic mass and condensed matter defined with relative atomic mass; every chemical element exists in three particle-generations thus, dark matter is invisible form (conjugate) of the visible element, its waveform manifests dark energy, it is not implicated in metric space expansion; Planck scale does not exist, radioactivity constrains fundamental length.

scholarly journals Identification of Students Misconception Using Two-Tier Diagnostic Test Completed with Certainty of Response Index (CRI) on Topic Partial Salt Hydrolysis

2019 ◽  
Vol 4 (2) ◽  
pp. 123
Author(s):  
Tomas Istantyo Putro ◽  
Sri Retno Dwi Ariani ◽  
Sri Yamtinah
Keyword(s):  
Diagnostic Test ◽  
Learning Process ◽  
Atomic Mass ◽  
Qualitative Description ◽  
Grade Student ◽  
Response Index ◽  
Relative Atomic Mass ◽  
Reasoning Pattern ◽  
The Subject ◽  
Science Major

<p>This study’s aim was to find misconception pattern on partial salt hydrolysis on eleventh grade student science major at SMA Negeri 2 Sukoharjo. Misconception was identified using two-tier diagnostic test completed with CRI supported by observation on learning process also interview. Two-tier diagnostic test composed of 16 questions. The approach of this study was qualitative description which was held in February-June 2018. The subject of this study were the eleventh grade students class IPA 1 and IPA 4 as many as 72 students. According to the result showed that there was misconception on almost every concept’s part. Based on the student answer analysis result shows if the pH, relative atomic mass, and volume were known student were having biggest misconception on counting salt’s mass are, 75%. The reason of misconception that occurs on partial salt hydrolysis is come from the student it self that is student’s uncomplete reasoning pattern.</p>

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