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  2. Block (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Block_(periodic_table)

    A block of the periodic table is a set of elements unified by the atomic orbitals their valence electrons or vacancies lie in. [1] The term seems to have been first used by Charles Janet. [2] Each block is named after its characteristic orbital: s-block, p-block, d-block, f-block and g-block.

  3. Livermorium - Wikipedia

    en.wikipedia.org/wiki/Livermorium

    In the periodic table, it is a p-block transactinide element. ... livermorium is sometimes called eka ... (corresponding to the breaching of the unreactive 7p 1/2 ...

  4. Post-transition metal - Wikipedia

    en.wikipedia.org/wiki/Post-transition_metal

    The p-block metals are the metals in groups 13‒16 of the periodic table. Usually, this includes aluminium, gallium, indium and thallium; tin and lead; and bismuth. Germanium, antimony and polonium are sometimes also included, although the first two are commonly recognised as metalloids.

  5. Chemically inert - Wikipedia

    en.wikipedia.org/wiki/Chemically_inert

    Most of the noble gases, which appear in the last column of the periodic table, are classified as inert (or unreactive). These elements are stable in their naturally occurring form (gaseous form) and they are called inert gases. [2]

  6. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    There are eight columns in this periodic table fragment, corresponding to at most eight outer-shell electrons. [32] A period begins when a new shell starts filling. [30] Finally, the colouring illustrates the blocks: the elements in the s-block (coloured red) are filling s-orbitals, while those in the p-block (coloured yellow) are filling p ...

  7. Lead - Wikipedia

    en.wikipedia.org/wiki/Lead

    Lead in the periodic table; Hydrogen: Helium: Lithium: Beryllium: Boron: ... Block p-block: Electron configuration ... Lead is a relatively unreactive post-transition ...

  8. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    118 chemical elements have been identified and named officially by IUPAC.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).

  9. Silicon - Wikipedia

    en.wikipedia.org/wiki/Silicon

    It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive. It is relatively unreactive. Silicon is a significant element that is essential for several physiological and metabolic processes in plants.