The new atomic weight of selenium was calculated as 78.9711(9).doi:10.1016/j.ijms.2011.07.023Jun WangTongxiang RenHai LuTao ZhouMotian ZhaoElsevier B.V.International Journal of Mass SpectrometryAbsolute isotopic composition and atomic weight of selenium using multi-collector inductively coupled plasma ...
the atomic weight. See also a copy of the periodic table with atomic weights to five significant figures. See also below the list in Name order . List of Elements in Atomic Number Order. At No SymbolName Atomic Wt Notes 1 H Hydrogen 1.00794(7) 1, 2, 3 2 He Helium 4.002602(2) 1,...
Density of Selenium is 4.81g/cm3. Physical and Chemical Properties of Selenium The physical and chemical properties of selenium are listed below: It is found as solid at 20 ℃ temperature. The relative atomic weight of selenium is 78.96. ...
the ratio between the quantity of heat required to raise unit weight of the given substance through 1°, start- ing from the given temperature, and the quantity of heat required to raise unit weight of standard substance through 1°, also starting from the given temperature) of beryllium for...
(2) 31GaGallium69.723(1) 32GeGermanium72.64(1) 33AsArsenic74.92160(2) 34SeSelenium78.96(3) 35BrBromine79.904(1) 36KrKrypton83.798(2)1,3 37RbRubidium85.4678(3)1 38SrStrontium87.62(1)1,2 39YYttrium88.90585(2) 40ZrZirconium91.224(2)1 41NbNiobium92.90638(2) 42MoMolybdenum95.96(2)1 43Tc...
Following the reviews of atomic-weight determinations and other cognate data in 2015, 2017, 2019 and 2021, the IUPAC (International Union of Pure and Applied Chemistry) Commission on Isotopic Abundances and Atomic Weights (CIAAW) reports changes of standard atomic weights. The symbol Ar°(E) was...
Keywords: atomic weights; atomic-weight intervals; cadmium; ciaaw.org; conventional atomic-weight values; half-life; IUPAC Technical Report; molybdenum; selenium; standard atomic weight; standardization; thorium; uranium. Dedicated to Norman Neill Greenwood – the 7th Chairman of the Commission. 1 ...
Electrons weigh very little, so they aren´t even counted in the atomic weight. 电子非常轻,因此在原子量中甚至没有计算它。 5. Indium, for example, had previously been assigned an atomic mass between those of arsenic and selenium. 例如,人们以前认为铟的原子质量介于砷和硒之间。 相邻词汇 同音...
Selenium Se 78.96 Seaborgium Sg 266 Silicon Si 28.0855 Silver Ag 107.8682 Sodium Na 22.989770 Strontium Sr 87.62 Sulfur S 32.065 Tantalum Ta 180.9479 Technetium Tc 98 Tellurium Te 127.60 Terbium Tb 158.92534 Element Symbol Atomic Weight Thallium TI 204.3833 Thorium Th 232.0381 Thulium Tm 168.93421 Tin...