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Which of the following law states that the middle element of the triad had both atomic mass and properties equal to the average of the other two elements of the triad ?

Which of the following law states that the middle element of the triad had both atomic mass and properties equal to the average of the other two elements of the triad ? Correct Answer Dobereiner's Law

The correct answer is Option(3).i.e.Dobereiner's Law. 

  • Dobereiner's Law of of Triads: 
    • Dobereiner grouped the elements in triads that mean groups of three elements. 
    •  The consecutive elements present in such a way that the middle element of the triad had both properties & atomic mass are equal to the average of the first & second elements of the triad. 
  • Example: 
    • Atomic Mass of C=12
    • Atomic Mass of O=16
    • So definitely the Atomic Mass of N= (12+16) / 2 =14. 
  • ​Importance of Periodic table: 
    • The Periodic table helps us to analyze the periodic trend in electron affinity, electronegativity, ionization potential, etc.
    • There are a total of 118 elements exist in nature and the discovery of new elements in the universe still continues.
    • Every element has its own value in the environment. 
    • It is a tool that is used to describe the known elements in groups. 
    • It helps us to concern a systematic study of the various elements & their compounds found in nature. 
    • It is necessary to study the physical & chemical properties of each of the elements present around us.

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