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Define valency . How is it determined ?...

Define valency . How is it determined ?

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The valency of an element may be defined as the combining capacities of elements. The electrons present in the outermost shell are called valence electrons and these electrons determine the valency of the atom.
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Additional Questions(2 MARK QUESTIONS)
  1. Anionic radius is higher than the corresponding neutral atom. Give rea...

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  2. What are isoelectronic ions ? Give examples.

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  3. Define lonization energy. Give its unit.

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  4. Ionization energy of beryllium is greater than the ionization energy o...

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  5. Ionization energy of nitrogen is greater than the ionization energy of...

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  6. Define electron gain enthalpy or electron affinity. Give its unit.

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  7. Electron gain enthalpy is F is less negative than Cl Why ?

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  8. Electron affinity of oxygen is less negative than sulphur. Justify thi...

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  9. Explain about the factors that affect electronegativity.

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  10. Explain about periodic variation of electronegativity across a period.

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  11. Explain about the period variation of electronegativity along a group.

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  12. Define valency . How is it determined ?

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  13. What is the basic difference in approach between Mendeleev's periodic ...

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  14. On the basis of quantum numbers, justify that the sixth period of the ...

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  15. Why do elements in the same group have similar physical and chemical p...

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  16. How do atomic radius vary in a period and in a group? How do you expla...

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  17. Explain why cation are smaller and anions are larger in radii than the...

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  18. What is basic difference between the terms electron gain enthalpy and ...

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  19. Would you expect the first lonization enthalpies of two isotopes of th...

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  20. Write the general electronic configuration of sp-d-, and f-block eleme...

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