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Mention any two anomalous properties of ...

Mention any two anomalous properties of second period elements.

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In the 1st group , lithium forms compounds with more covalent character while the other elements of this group form only ionic compounds.
(ii) In the `2^(nd)` group , beryllium forms compounds with more covalent character while the other elements of this family form only ionic compounds.
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-II. WRITE BRIEF ANSWER TO THE FOLLOWING QUESTIONS.
  1. Successive ionization energy values increase Why ?

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  2. Energy of an electron in the ground state of the hydrogen atom is -2....

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  3. The electronic configuration of atom is one of the important factor wh...

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  4. In what period and group will an element with Z=118 will be present?

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  5. Justify that the fifth period of the periodic table should have 18 el...

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  6. Elements a,b,c and d have the following electronic configurations: ...

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  7. Give the general electronic configuration of lanthanides and actides?

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  8. Why halogens act as oxidising agents?

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  9. Mention any two anomalous properties of second period elements.

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  10. Explain the pauling method for the determination os ionic radius.

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  11. Explain the periodic trend of ionisation potential.

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  12. Explain the diagonal relationship

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  13. Why the first ionisation enthalphy of sodium is lower than that of mag...

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  14. By using paulings method calculate the ionic radii of K^(+)andCl^(-) ...

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  15. Explain the following give appropriate reasons. (i) Ionisation po...

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  16. First ionisation potential of C- atom is greater than that of B atom ,...

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  17. The electron affinity values of Be, Mg are zero and those of N (0.02 e...

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  18. The formation of F^(-)(g) from F(g) is exothermic while that of O^(2-...

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  19. What is screening effect ?

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  20. Briefly give the basis for pauling's scale of electronegativity.

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