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Electonic configuration of an atom i...

Electonic configuration of an atom is 2,8,7, . To which of the following elements would would it be chemically similar ?

A

nitrogen (Z = 7)

B

fluorine (Z = 9)

C

phosphorus (Z - 15)

D

argon (Z - 18)

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VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS-THE PERIODIC TABLES-EXERCISE
  1. Number of elements present in period - 2 of the long form per...

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  2. Nitrogen (Z=7) is the element of group V of the periodic table. Which...

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  3. Electonic configuration of an atom is 2,8,7, . To which of the ...

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  4. Which of the following is the most active metal ?

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  5. Aluminium does not react with water at room temperature but r...

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  6. How can you explain Aluminium (Al) is a metalloid with chemical equati...

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  7. What relation about elements did dobereiner want to establish ?

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  8. The densities of calcium (ca ) and barium (Ba ) are 1.55 and 3.5...

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  9. All akali metals are solids but hydrogen is a gas with diatomic...

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  10. IF lanthanides and actinides are inserted within the table . Im...

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  11. Do you know why Newlands proposed the law of octaves ? Explain...

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  12. Why did Mendeleeff had to leave certain blank spaces in his per...

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  13. What is your understanding about Ea (2 ) O(3 ) , EsO(2) ?

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  14. Second ionization energy of an element is higher than its firs...

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  15. The calculated electron gain enthaly values for alkaline earth m...

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  16. Do you think Newland's law of octaves is correct ? Justify .

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  17. Why are lanthanides and actinides placed separately at the bot...

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  18. The second period element , for example , for example 'F' has ...

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  19. Observe the following table and Fill it . Observations ...

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  20. Observe the following table and Fill it . Observations ...

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