Multiple choice

According to the periodic law, when the elements are arranged in the _______________ order of their ________________, their properties show periodicity.

  1. increasing, atomic weights

  2. decreasing, atomic weights

  3. increasing, atomic numbers

  4. decreasing, atomic numbers

  5. increasing, atomic mass numbers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As per the definition of the modern periodic law stated by Mosely, the physical and chemical properties of elements are the periodic functions of their atomic numbers. Hence, the third option is correct.

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