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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, some of the Doberiener.s triads did exist in the columns of Newlands. octaves. For example,
`ubrace(Li, Na, K)_("(triad)")" " ubrace(Be, Mg, Ca)_("(triad)")`
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MTG IIT JEE FOUNDATION-PERIODIC CLASSIFICATION OF ELEMENTS-NCERT Section
  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: three elements that have a single electron in their outermost sh...

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  11. Name: two elements that have two electrons in their outermost shells.

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  12. Name: three elements with filled outermost shells.

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  13. Lithium, sodium, potassium are all metals that react with water to lib...

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  14. Helium is an unreactive gas and neon is a gas of extremely low reactiv...

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

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

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

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

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  19. which element has two shells, both of which are completely filled wi...

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  20. which element has the electronic configuration 2, 8, 2?

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