Multiple choice

Which of the following properties was adopted as the basis of the modern periodic table?

  1. Atomic mass

  2. Atomic radius

  3. Density

  4. Atomic number
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D Correct answer
Explanation

The earlier attempts at classification of elements was based on atomic masses. Later on, it was found that atomic number is a more appropriate parameter to determine the properties of an element. Therefore, in the modern periodic table, elements are arranged in the increasing order of their atomic number. 

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