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Chaitan Singh
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Asked: 2020-10-21T04:40:31+00:00 In:

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

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NCERT Solution for Class 10 Science Chapter 5
Periodic Classification of Elements
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-81
Questions No-1

2020-2021cbsechapter 5class10ncertperiodic classificationscience
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    5 Answers

    1. Yes, in second and third column of octave.

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    2. Yes two triads.

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    3. Döbereiner’s two triads exist in Newland’s Octaves.

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    4. Yes, Newland’s second and third column is contains Döbereiner’s trieds.

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    6. Yes, Dobereiner’s traiads exists in the columns of Newland’s Octaves.
      Example – In the Dobereiner’s triads Lithium, Sodium and Potassium make a triad, and these elements also present in the same column of Newland’s Octaves as these have same properties.

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