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What is the need for classification of e...

What is the need for classification of elements ?

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Elements were classified for studying them in a better way. The need for classification of elements was to :
Study elements in an organized way.
To correlate the properties of the elements with some fundamental properties which are characteristics of all the states of matter.
To reveal relationship between elements.
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ICSE-THE PERIODIC TABLE -TOPIC 1 Modern Periodic Table and its Periodicity (3 Marks Questions )
  1. What is the need for classification of elements ?

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  2. Use Mendeleev.s periodic Law to predict the formula of Oxides of potas...

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  3. State the merits of Mendeleev's classification of elements.

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  4. State the merits of Mendeleev's classification of elements.

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  5. Name the element whose properties can be predicted on the basis of its...

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  6. Name two elements whose atomic weights were corrected on the basis of ...

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  7. How many elements were known at the time of Mendeleev's classification...

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  8. What are the groups known as ? Group 1

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  9. What are the groups known as ? Group 17

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  10. What are the groups known as ? Group 18

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  11. Name any one element of each group.

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  12. How does number of Valence electrons on moving from left to right In...

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  13. How does number of valency vary on moving from left to right In the ...

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  14. How does number of Valence electrons on moving from left to right In...

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  15. How does number of valency vary on moving from left to right In the ...

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  16. What is meant by a group in the periodic table?

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  17. Explain why the elements of the same group exhibit the same chemical b...

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  18. In which Group the inert gases are placed in the periodic table ?

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  19. A part of the periodic table is shown below with one element missing :...

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  20. A part of the periodic table is shown below with one element missing :...

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