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The electronic configuration of an eleme...

The electronic configuration of an element is 2, 8, 5. To which group and period does it belong ?

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The electronic configuration of an element is 2, 8, 5. To which group are period does it belong ?

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NARAYNA-CLASSIFICATION OF ELEMENTS AND PERIODICITY -CHECK YOUR GRASP
  1. The discovery of which of the following group of elements gave a death...

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  2. Introduction | Development of Periodic Table

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  3. The places that were left empty by Mendeleev were for:

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  4. State Modern periodic law.

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  5. The electronic configuration of an element is 2, 8, 5. To which group ...

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  6. Which one among the following ions, is smallest in size

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  7. In the ions P^(3-),S^(2-) and Cl, the increasing order of size is:

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  8. Out of I and I^(+) which has larger size and why ?

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  9. Which element has highest first ionization energy?

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  10. Among the following elements, which one has the highest ionization ene...

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  11. Out of Na and Mg which has higher second ionisation energy?

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  12. Why do halogens have maximum negative electron gain enthalpy in the re...

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  13. S has more negative electron gain enthalpy than O why ?

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  14. Assertion : Noble gases have highest ionisation enthalpies in their re...

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  15. The element with highest electronegativity is

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  16. On going from right to left in a period in the periodic table the elec...

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  17. Define electronegativity. How does it differ from electron gain enthal...

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  18. (a) Define valency of an element. What valency will be shown by an ele...

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  19. What is valency of 'Li' w.r.t. H ?

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  20. What is valency of 'C' w.r.t. Cl ?

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