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8 May, 10:53

How are elements arranged in the periodic table?

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  1. 8 May, 14:12
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    The elements are arranged in horizontal rows, or periods, by order of increasing atomic number, which equals the number of protons in the atomic nucleus of each element.
  2. 8 May, 14:17
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    The periodic table arranges all of the known elements in an informative array. Elements are arranged in order of increasing atomic number. Order generally coincides with increasing atomic mass.
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