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(a) On what basis did Mendeleev arrange ...

(a) On what basis did Mendeleev arrange the elements in his periodic table?
(b) On what basis are they arranged now?

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The correct Answer is:
(a) Atomic masses (b) Atomic numbers
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. (a) On what basis did Mendeleev arrange the elements in his periodic t...

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  2. State whether the following statements are true or false: (a) Newlan...

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  3. Name of Russian chemist who said that the properties of elements are a...

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  4. Rewrite the following statements after correction, if necessary: (a)...

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  5. Triads And Law Of Octaves

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  6. A,B and C are the elements of a Deobereiner's triad. If th atomic mass...

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  7. X and Y are the two elements having similar properties which obey Newl...

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  8. What was the Mendeleev's basis of the classification of elements.?

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  9. In the classificatioin of the then known elements, Mendeleev was guide...

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  10. Name two elements whose properties were predicted on the basis of thei...

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  11. The three elements predicted by Mendeleev from the gaps in his periodi...

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  12. Name two elements whose properties were predicted on the basis of thei...

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  13. A,B and C are the elements of a Deobereiner's triad. If th atomic mass...

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  14. Which group of elements could be placed in mendeleev's periodic table ...

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  15. Fill in the following blanks with suitable words: (a) The basis for...

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  16. (a) What is meant by (i) a group and (ii) a period in a periodic table...

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  17. NEWLAND'S LAW OF OCTAVES

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  18. (a) State the merits of Mendeleev's classification of elements. (b) ...

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  19. (a) How do the properties of eka-aluminium element predicted by Mendel...

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  20. (a) Why do we classify elements? (b) What were the two criteria used...

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