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  2. Oxygen - Wikipedia

    en.wikipedia.org/wiki/Oxygen

    Oxygen is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table , a highly reactive nonmetal , and a potent oxidizing agent that readily forms oxides with most elements as well as with other compounds .

  3. Chemical symbol - Wikipedia

    en.wikipedia.org/wiki/Chemical_symbol

    The periodic table, elements being denoted by their symbols. Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities.

  4. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.

  5. Main-group element - Wikipedia

    en.wikipedia.org/wiki/Main-group_element

    In chemistry and atomic physics, the main group is the group of elements (sometimes called the representative elements) whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements.

  6. Chemical element - Wikipedia

    en.wikipedia.org/wiki/Chemical_element

    Atomic number, Element, and Symbol all serve independently as unique identifiers. Element names are those accepted by IUPAC. Block indicates the periodic table block for each element: red = s-block, yellow = p-block, blue = d-block, green = f-block. Group and period refer to an element's position in the

  7. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    The periodic table, ... (e.g. oxygen, sulfur, ... Periodic tables usually at least show the elements' symbols; many also provide supplementary information about the ...

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    Personal and celebrity stylist Kim Appelt predicts a general trend toward convenience, comfort, and ease in 2025.. In other words, jewelry that goes with everything — like stacked gold pieces ...

  9. Chalcogen - Wikipedia

    en.wikipedia.org/wiki/Chalcogen

    Amphid salts was a name given by Jons Jacob Berzelius in the 19th century for chemical salts derived from the 16th group of the periodic table which included oxygen, sulfur, selenium, and tellurium. [76] The term received some use in the early 1800s but is now obsolete. [77] The current term in use for the 16th group is chalcogens.

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