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- IUPAC - International Union of Pure and Applied Chemistry ...
  
  The International Union of Pure and Applied Chemistry (IUPAC) serves to advance the worldwide aspects of the ...
  
  2024-04-10
  
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- www.chem.qmul.ac.uk
  
  Periodic Table - QMUL > Chemistry
  
  This version of the Periodic table is based on that recommended by the Commission on the Nomenclature of Inorganic Chemistry and ... Pa, and U) do have a characteristic terrestrial isotopic composition, and for these an atomic weight is tabulated. The nam
  
  2024-04-11
  
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IUPAC Periodic Table of the Elements H - IUPAC - International Union of Pure and Applied Chemistry:

日期：2024-04-16

1 H hydrogen [1.007, 1.009] 1 18 3 Li lithium [6.938, 6.997] 4 Be beryllium 9.012 11 Na sodium 22.99 12 Mg magnesium [24.30, 24.31] 19 K potassium 39.10 20 Ca calcium 40.08 37 Rb rubidium 85.47 38 Sr strontium 87.62 55 Cs caesium 132.9 56 Ba barium 137 .....

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IUPAC Periodic Table of the Elements H - IUPAC - International Union of Pure and Applied Chemistry:

日期：2024-04-10

1 H hydrogen [1.007; 1.009] 1 18 3 Li lithium [6.938; 6.997] 4 Be beryllium 9.012 11 Na sodium 22.99 12 Mg magnesium 24.31 19 K potassium 39.10 20 Ca calcium 40.08 37 Rb rubidium 85.47 38 Sr strontium 87.62 55 Cs caesium 132.9 56 Ba barium 137.3 87 Fr...

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International Union of Pure and Applied Chemistry > Periodic Table of the Elements

日期：2024-04-17

Periodic Table of the Elements > printable version [pdf file - 88KB] (version date 1 May 2013) - including the standard atomic weights 2011 abridged to four significant digits (as published in PAC 85, table 4, p. 1068; http://dx.doi.org/10.1351/PAC ......

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Periodic Table - Research Centers | Center for Synchrotron Radiation Research a

日期：2024-04-15

Periodic Table Switch to the text box version of Mucal. Click on any button with element name to get its x-ray properties. If you give an energy value in the box at the top of the table then you also get x-ray cross-sections at that energy. The sources fo...

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Group (periodic table) - Wikipedia, the free encyclopedia

日期：2024-04-10

In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, but the f-block columns (between groups 2 and 3) are not numbered. The elements in a...

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IUPAC Periodic Table of the Isotopes - ScienceGeek.net Homepage

日期：2024-04-12

IUPAC Periodic Table of the Isotopes 1 H 2 [1.007 84; 1.008 11] hydrogen 1 7 Li 6 [6.938; 6.997] lithium 3 Be 9 9.012 182(3) beryllium 4 1 B 10 [10.806; 10.821] boron 5 2 C 13 [12.0096; 12.0116] carbon 6 14 N 5 [14.006 43; 14.007 28] nitrogen 7 16 8 O 17 ...

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Periodic Table of Elements (EnvironmentalChemistry.com)

日期：2024-04-11

Our policy for Including New Elements on our periodic table Our policy is to only create individual element pages for elements on our periodic table that have been officially recognized and named by the International Union of Pure and Applied Chemists (IU...

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Periodic Table b

日期：2024-04-17

Periodic Table of the Elements 1 H 1.00794* 1 H 1.00794* 2 He 4.002602 3 Li 6.941* 4 Be 9.012182 5 B 10.811* 6 C 12.0107* 7 N 14.00674* 8 O 15.9994* 9 F 18.9984032 10 Ne 20.1797 11 Na 22.98976928 12 Mg 24.3050 13 Al 26.9815386 14 Si 28.0855*...

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