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  2. Iridium - Wikipedia

    en.wikipedia.org/wiki/Iridium

    The price is high and varying (see table). Illustrative factors that affect the price include oversupply of Ir crucibles [79] [81] and changes in LED technology. [82] Platinum metals occur together as dilute ores. Iridium is one of the rarer platinum metals: for every 190 tonnes of platinum obtained from ores, only 7.5 tonnes of iridium is ...

  3. Extended periodic table - Wikipedia

    en.wikipedia.org/wiki/Extended_periodic_table

    An extended periodic table theorizes about chemical elements beyond those currently known and proven. The element with the highest atomic number known is oganesson (Z = 118), which completes the seventh period (row) in the periodic table. All elements in the eighth period and beyond thus remain purely hypothetical.

  4. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    The definitive visualisation of all 118 elements is the periodic table of the elements, ... Ir Iridium: Iris, Greek goddess of rainbow 9 6 d-block 192.22: 22.56: 2719 ...

  5. Group 9 element - Wikipedia

    en.wikipedia.org/wiki/Group_9_element

    Group 9, by modern IUPAC numbering, [1] is a group (column) of chemical elements in the d-block of the periodic table. Members of Group 9 include cobalt (Co), rhodium (Rh), iridium (Ir) and meitnerium (Mt). [2] These elements are among the rarest of the transition metals. [3]

  6. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    Periodic table of the chemical elements showing the most or more commonly named sets of elements (in periodic tables), and a traditional dividing line between metals and nonmetals. The f-block actually fits between groups 2 and 3; it is usually shown at the foot of the table to save horizontal space.

  7. 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.

  8. Platinum group - Wikipedia

    en.wikipedia.org/wiki/Platinum_group

    The platinum-group metals (PGMs), also known as the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs), are six noble, precious metallic elements clustered together in the periodic table. These elements are all transition metals in the d-block (groups 8, 9, and 10, periods 5 ...

  9. Chemical element - Wikipedia

    en.wikipedia.org/wiki/Chemical_element

    Use of the periodic table is now ubiquitous in chemistry, providing an extremely useful framework to classify, systematize and compare all the many different forms of chemical behavior. The table has also found wide application in physics , geology , biology , materials science , engineering , agriculture , medicine , nutrition , environmental ...

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