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  2. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...

  3. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    Thus, it is relatively easy to predict the chemical properties of an element if one knows the properties of the elements around it. [9] Today, 118 elements are known, the first 94 of which are known to occur naturally on Earth at present. [10] [a] The remaining 24, americium to oganesson (95–118), occur only when synthesized in laboratories.

  4. 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.

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

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

    Here [Ne] refers to the core electrons which are the same as for the element neon (Ne), the last noble gas before phosphorus in the periodic table. The valence electrons (here 3s 2 3p 3) are written explicitly for all atoms. Electron configurations of elements beyond hassium (element 108) have never been measured; predictions are used below.

  6. Chemical element - Wikipedia

    en.wikipedia.org/wiki/Chemical_element

    There are now 118 known elements. In this context, "known" means observed well enough, even from just a few decay products, to have been differentiated from other elements. [9] [10] Most recently, the synthesis of element 118 (since named oganesson) was reported in October 2006, and the synthesis of element 117 was reported in April 2010.

  7. 25 Unconventional Pets Owned by Celebrities - AOL

    www.aol.com/lifestyle/25-unconventional-pets...

    Celebrity: American actress and film producer Reese Witherspoon Animal:Donkeys Names: Honky and Tonky Make a good pet? Yes, if you have the space. Catherine of Aragon’s monkey

  8. Names for sets of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Names_for_sets_of_chemical...

    Superactinides – Hypothetical series of elements 121 to 157, which includes a predicted "g-block" of the periodic table. Transactinide elementsElements after the actinides (atomic number greater than 103). Transplutonium elementsElements with atomic number greater than 94. Transuranium elementsElements with atomic number ...

  9. AOL

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