Essential Chemistry for IGCSE - The Periodic Table (Section 1 - No. 17)
Which of the following statements best describes the arrangement of elements in the periodic table?
Elements are arranged by increasing atomic mass, with elements having similar properties in the same column.
Elements are arranged by increasing atomic number, with elements having similar properties in the same column.
Elements are arranged randomly, but elements with similar properties are grouped together.
Elements are arranged by decreasing atomic number, with elements having similar properties in the same row.
Explanation
Elements are arranged by increasing atomic number, with elements having similar properties in the same column (groups).
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