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Did Döbereiner’s triads also exist in th...

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

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Yes, Dobereine's traids also exists in the column of newlands' Octaves. One such column is Li, K,Na
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NCERT-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves...

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  2. What were the limitations of Döbereiner’s classification?

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  3. What were the limitations of Newlands’ Law of Octaves?

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  4. Use Mendeléev’s Periodic Table to predict the formulae for the oxides ...

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  5. Besides gallium, which other elements have since been discovered that ...

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  6. What were the criteria used by Mendeléev in creating his Periodic Tabl...

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  7. Why do you think the noble gases are placed in a separate group?

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  8. How could the Modern Periodic Table remove various anomalies of Mendel...

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  9. Name two elements you would expect to show chemical reactions similar ...

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  10. Name (a) three elements that have a single electron in their outermo...

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  11. (a) Lithium, sodium, potassium are all metals that react with water to...

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  12. In the Modern Periodic Table, which are the metals among the first ten...

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  13. By considering their position in the Periodic Table, which one of the ...

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  14. Which of the following statements is not a correct statement about the...

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  15. Element X forms a chloride with the formula XCl(2), which is a solid w...

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  16. Which element has (a) two shells, both of which are completely filled...

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  17. (a) What property do all elements in the same column of the Periodic T...

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  18. An atom has electronic configuration 2, 8, 7. (a) What is the atomic n...

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  19. The position of three elements A, B and C in the Periodic Table are sh...

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  20. Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to...

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