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  2. Electron configurations of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Electron_configurations_of...

    As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. However there are numerous exceptions; for example the lightest exception is chromium, which would be predicted to have the configuration 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 4s 2 , written as [Ar] 3d 4 4s 2 , but whose actual configuration given ...

  3. Periodic table (electron configurations) - Wikipedia

    en.wikipedia.org/wiki/Periodic_table_(electron...

    Configurations of elements 109 and above are not available. Predictions from reliable sources have been used for these elements. Grayed out electron numbers indicate subshells filled to their maximum. Bracketed noble gas symbols on the left represent inner configurations that are the same in each period. Written out, these are: He, 2, helium : 1s 2

  4. Ruthenium - Wikipedia

    en.wikipedia.org/wiki/Ruthenium

    Ruthenium is a chemical element; it has symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is unreactive to most chemicals.

  5. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    The following table shows the electron configuration of a neutral gas-phase atom of each element. Different configurations can be favoured in different chemical environments. [ 52 ] The main-group elements have entirely regular electron configurations; the transition and inner transition elements show twenty irregularities due to the ...

  6. Template:Periodic table (electron configuration) - Wikipedia

    en.wikipedia.org/wiki/Template:Periodic_table...

    Upload file; Search. Search. Appearance. Donate; ... Electron configurations of the chemical ... Ru 1 7 - 45 Rh 1 8 - 46 Pd-10 - 47 Ag 1 10 - 48 Cd 2 10 - 49 In 2 10 ...

  7. Template : Periodic table (electron configuration)/sandbox

    en.wikipedia.org/wiki/Template:Periodic_table...

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  8. List of elements by atomic properties - Wikipedia

    en.wikipedia.org/wiki/List_of_elements_by_atomic...

    This is a list of chemical elements and their atomic properties, ordered by atomic number (Z).. Since valence electrons are not clearly defined for the d-block and f-block elements, there not being a clear point at which further ionisation becomes unprofitable, a purely formal definition as number of electrons in the outermost shell has been used.

  9. Template:Periodic table - Wikipedia

    en.wikipedia.org/wiki/Template:Periodic_table

    Ruthe­nium 44 Ru 101.07: Rho­dium 45 Rh 102.91: Pallad­ium 46 Pd 106.42: Silver 47 Ag 107.87: Cad­mium 48 Cd 112.41: Indium 49 In 114.82: Tin 50 Sn 118.71: Anti­mony 51 Sb 121.76: Tellur­ium 52 Te 127.60: Iodine 53 I 126.90: Xenon 54 Xe 131.29: 6: Cae­sium 55 Cs 132.91: Ba­rium 56 Ba 137.33: Lute­tium 71 Lu 174.97: Haf­nium 72 Hf 178. ...