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In the periodic table, the vertical colu...

In the periodic table, the vertical columns are called ______ (periods/groups)

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ICSE-THE PERIODIC TABLE -TOPIC 1 Modern Periodic Table and its Periodicity (1 Mark Questions )
  1. The longest period of periodic table has elements [36/32]

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  2. In the periodic table, the vertical columns are called (periods/group...

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  3. Group II metals are called metals. (alkali/alkaline earth).

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  4. Properties of the elements are a periodic function of their . (atomic...

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  5. Elements in the first period have valence electrons in

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  6. The pair of elements showing diagonal relationship are:

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  7. What are those elements which belong to Groups 1,2, 13, 14, 15, 16, 17...

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  8. The correct order of reactivity in alkali metals is:

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  9. Properties of eka aluminium matches well with:

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  10. The number of elements and no. of shells in third period is respective...

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  11. The typical elements in periodic table are

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  12. Chlorine lies in which period and group of the periodic table:

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  13. The correct order of size of atoms is

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  14. What was the basis of the earliest attempts made for classification an...

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  15. State Mendeleev.s periodic law.

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  16. Which group of elements was missing from Mendeleev's original periodic...

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  17. From the standpoint of atomic structure, what determines which element...

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  18. How do atomic structures (electron arrangement) change in a period wit...

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  19. What happens to number of valence electrons in atoms of elements as we...

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  20. Give reason : Metals form positive ions.

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