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Who noted that there were groups of elem...

Who noted that there were groups of elements with three elements known as traids in each groups ?

A

Dobereiner

B

Moselery

C

Mendeleeff

D

Joseph Louis Froust

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BEYOND PUBLICATION-CLASSIFICATION OF ELEMENTS THE PERIODIC TABLE-EXERCISE
  1. Which group elements are called halogen family ?

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  2. In modern periodic table each periodic ends with

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  3. Who noted that there were groups of elements with three elements known...

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  4. Which of the following element family belongs to 16 (VIA) Group ?

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  5. Which block elements are called the inner transition elements ?

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  6. Which group elements are called Boron family ?

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  7. Which of the following group elements are called alkali metal family ?

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  8. Which block elements are called as transition metals ?

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  9. According to which of the following characteristic of an element the m...

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  10. Which of the following property is measured in 'pm' (pico meter) units...

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  11. Which of the following group elements are nitrogen family ?

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  12. By analysing which patterns the modern periodic table is proposed ?

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  13. Which of the following are elements belongs to (VIII A) group ?

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  14. What is the general electronic configuration of Noble gases?

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  15. In which units ionizations energy can be expressed ?

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  16. Which of the following is defined as the number of positive charges in...

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  17. Which block elements are called representative elements ?

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  18. As we move from top to bottom in a group the metallic character :

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  19. The elements which have properties that are intermediate between the p...

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  20. Who arranged the elements in a chart in the systematic order in the in...

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