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A part of the periodic table is shown be...

A part of the periodic table is shown below with one element missing:

Based on the above table, answer the following question:
Identify the missing element.

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Phosphorus
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ICSE-THE PERIODIC TABLE -TOPIC 1 Modern Periodic Table and its Periodicity (1 Mark Questions )
  1. The pair of elements showing diagonal relationship are:

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

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

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  4. Properties of eka aluminium matches well with:

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

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  6. The typical elements in periodic table are

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

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  8. The correct order of size of atoms is

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

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  10. State Mendeleev.s periodic law.

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

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

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

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

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  15. Give reason : Metals form positive ions.

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  16. A part of the periodic table is shown below with one element missing: ...

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  17. Give reasons for the following Hydrogen is kept in I A group of the ...

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  18. Provide reason for each of the following: Discarding the law of triad.

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  19. Name the first and last alkali metals

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  20. Define the following: Atomic number

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