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A part of the early classification of el...

A part of the early classification of elements has been given below:

(a) Which law of classification of elements is illustrated by te above arrangement of elements?
(b) Name the scientist who proposeed such a classification of elements.
(c) Why is such a classification of elements compared with a characteristic of musical scale?
(d) State one limitation of this classification of elements.

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The correct Answer is:
(a) Newlands' law of octaves (b) Newlands (c) Because in this classification, the repetition in the properties of elements is just like the repetition of eighth note in an octave of music (d) This could be applied only up to the element calcium and not beyond that

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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. Consider the followng elements: Ca, Cl, Na, I, Li, Ba Sr, K, Br Se...

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  2. Mendeleve predicted the exitence of certain elements not known at that...

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  3. A part of the early classification of elements has been given below: ...

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  4. (a) Explain why: (i) All the elements of a group have similar chemic...

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  5. (a) How does the electropositive character of elements change on going...

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  6. (a) What is the fundamental difference in the electronic configuration...

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  7. (a) What is the usual number of valence electrons and valency of group...

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  8. (a) What is the main characteristic of the last elements in the perio...

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  9. (a) How does the atomic size vary on going down form top to bottom in ...

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  10. (a) How does the tendency to lose electrons change as we go down in gr...

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  11. (a) Why does the side of the atoms progressively become smaller when w...

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  12. (a) In the modern Periodic Table, why does cobalt with higher atomic m...

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  13. (a) Explain why the first period of the modern periodic table has only...

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  14. (a) What is a group in the periodic table in which part of a group wou...

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

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  16. The electronic configuration of the atom of an element X is 2,8,4. In ...

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  17. The atomic number of an element is 20. In modern periodic table, this ...

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  18. Five elements A, B, C, D and E have atomic numbers of 2, 3, 7, 10 and ...

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  19. The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 ...

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  20. Which of the following elements would lose an electron easily ?

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