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Out of Döbereiner's triads and Newlands'...

Out of Döbereiner's triads and Newlands' octaves, which classification is better? Why?

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Even though both Döbereiner.s triads and Newlands. octaves are erratic and incomplete, Newlands. octaves are better since more number of elements could be classified into octaves.
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (VERY SHORT ANSWER (VSA) TYPE QUESTIONS)
  1. In a triad of three elements A, B, and C, the atomic mass of A and B a...

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  2. According to Newlands' classification of elements, the properties of e...

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  3. Out of Döbereiner's triads and Newlands' octaves, which classification...

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  4. State the Modern Periodic law. What is the Modern Periodic Table calle...

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  5. Define group and period with reference to the Modern Periodic Table.

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  6. Compare and contrast the arrangement of elements in Mendeleev's period...

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  7. How were transition elements placed in 0 Mendeleev's Periodic Table an...

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  8. How do transition elements differ from other elements?

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  9. State the Modern Periodic law. Where are metals and nonmetals found in...

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  10. Write the atomic numbers of two elements X and Y having electronic con...

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  11. Account for the following: Elements of group 17 are monovalent.

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  12. Account for the following: Elements of group 18 are zerovalent.

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  13. Elements A, B, C, and D have atomic numbers 1, 8, 11, and 19 respectiv...

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  14. Out of the two elements X and Y which has a bigger atomic radius? (i...

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  15. Out of the two elements, potassium and sodium, which one can lose elec...

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  16. Mention the type of compounds formed between group 1 and group 17 elem...

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  17. Write the number of vertical columns in the periodic table. What are t...

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  18. Write the number of horizontal rows in the modern periodic table. What...

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  19. Predict the maximum number of valence electrons possible for atoms in ...

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  20. What is the nature of oxides formed by most of p - block elements ?

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