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The chemical elements are arranged in order of increasing atomic number. The rows are called periods and the columns are called groups.

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IsrarAwan
The correct answer is: True

Explanation:
Indeed the chemical elements in the periodic table are arranged in terms of their atomic number. They are usually written at the top of the elements in the boxes of the periodic table. Furthermore, in the periodic table, the rows are called the periods and columns are called the groups.

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