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Write the name and deduce the atomic num...

Write the name and deduce the atomic number of the following element
(i) The second alkali metal
(ii) The fourth noble gas
(iii) The third halogen
(iv) The first transilation element

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(i) Sodium (Z=11)
(ii) Krypton (Z=36)
(iii) Bormine (Z=35)
(iv) Scandium (Z=21)
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL SHORT ANSWERS
  1. Calculate the Effective nuclear charge of helium.

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  2. Write the name and deduce the atomic number of the following element ...

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  3. Lanthanoids and actinoids are placed in separate rows at the bottom of...

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  4. Describe in drief Lother Meyer's classification of elements.

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  5. Explain classification of elements based on Newland 's law of Octaves...

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  6. Justify the given statement with suitable examples the properties of t...

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  7. State the findings of modern periodic law.

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  8. State Mendeleev's period law.

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  9. What are the demerties of long form periodic table.

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  10. What are transuranium elements?

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  11. What are transfermium elements?

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  12. How many elements can be accommodated in the long form of the periodic...

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  13. Name the p block elements that exist as liquids at room temperature.

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  14. What are representative elements?

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  15. What are metalloids ? Give example.

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  16. The number of elements in the first period is only 2. Give reason.

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  17. The elements Z=117 and 120 have not yet been discovered. In which fami...

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  18. Arrange the following elements in the increasing order of metallic cha...

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  19. Predict the periods and blocks to which each of the following elements...

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  20. Why are noble gases chemically inert?

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