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  1. Dictionary
    periodical
    /ˌpɪərɪˈɒdɪkl/

    noun

    • 1. a magazine or newspaper published at regular intervals.

    adjective

    • 1. occurring or appearing at intervals; occasional: "she took periodical gulps of her tea"

    More definitions, origin and scrabble points

  2. 4 days ago · Newspapers. Newspapers are primary sources about events. They provide current information (local, regional, and global), hard news, classified ads, editorials, and speeches. Written for a general educated audience, they are easy to read. The authors are professional journalists, who work for commercial publishers.

    • John Repplinger
    • 2010
  3. 2 days ago · A periodical is a magazine, journal, newspaper, or similar item that comes out periodically, i.e. once a week, month, etc. It's good to be able to distinguish between scholarly and non-scholarly periodicals, especially for more advanced research. See the Scholarly Journals guide for more info.

  4. 4 days ago · The periodic table is an arrangement of the chemical elements, structured by their atomic number, electron configuration and recurring chemical properties. In the basic form, elements are presented in order of increasing atomic number, in the reading sequence. Then, rows and columns are created by starting new rows and inserting blank cells, so ...

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  6. 4 days ago · Inside the periodic table, the arrangement of elements is in the form of rows and columns. The rows are called periods and the columns are called groups. The first 20 elements of the periodic table are the fundamental building blocks of matter and predict the periodic trends that influence their behaviour.

  7. 4 days ago · Definition: Periodic Trend A periodic trend is a specific pattern in the physical or chemical properties of the elements. Periodic trends may occur across a period, up or down a group, or from one corner of the periodic table to another corner.

  8. 3 days ago · Ulrich's Periodicals Directory is a database that can be used to identify refereed journals, but be aware that only the scholarly content in these journals is peer-reviewed - news items and opinion pieces might also be included, but not reviewed.

  9. 2 days ago · matter, material substance that constitutes the observable universe and, together with energy, forms the basis of all objective phenomena. At the most fundamental level, matter is composed of elementary particles known as quarks and leptons (the class of elementary particles that includes electrons).