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Why there is a need for classification o...

Why there is a need for classification of elements?

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(i) Classification is a fundamental and essential process in our day-to-day life for the effective utilization of resources, daily events and materials.
(ii) In such a way, for the effective utilization of discovered elements becomes fundamentally essential process.
(iii) The periodic classification of the elements is one of the outstanding contributions to the progress of chemistry.
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Additional Questions(3 MARK QUESTIONS)
  1. Why there is a need for classification of elements?

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  2. Prove that the halogens, chlorine, bromine and iodine follow the law o...

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  3. What are the salient features of Newland's law of octaves?

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  4. How the properties of Eka-silicon was related to germanium?

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  5. Compare the properties of Eka-aluminium and gallium.

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  6. Explain about the relationship between the atomic number of an element...

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  7. What are the reasons behind the Moseley's attempt in finding atomic nu...

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  8. Draw a simplified form of periods and elements present in modern perio...

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  9. Write the electronic configuration of alkali metals ""(3)Li,(11)Na, ""...

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  10. Explain about the classification of elements based on electronic confi...

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  11. Write about the electronic configuration of 1^(st) and 2^(nd) period.

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  12. How many elements are there in 4^(th) period? Prove it.

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  13. How many elements are there in 6^(th) period? Prove it.

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  14. What are the two exceptions of block division in the periodic table?

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  15. Explain about the salient features of metals.

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  16. Explain about the characteristic of non - metals.

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  17. Periodic change in electronic configuration is responsible for the phy...

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  18. What is covalent radius ? . How would you determine the covalent radiu...

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  19. Define metallic radius.

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  20. Arrange Na^(+),Mg^(2+) and Al^(3+) in the increasing order of ionic ra...

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