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Define lonization enthalpy....

Define lonization enthalpy.

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The energy required to remove the most loosely held electron from an isolated gaseous atom is called as ionization energy (i.e) `"Atom"_(("g"))+"Energy"to"Positive Ion"_(("g"))div"Electron"`
`"Li"_((g))+520" kJ mol"^(-1)to"Li"_((g))^(+)+e^(-)`
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL SHORT ANSWERS
  1. How does the shielding effect caused by inner electrons affect the ion...

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  2. Larger the size of the atom ,lesser is the ionisation energy . Explain...

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  3. Define lonization enthalpy.

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  4. Noble gases have almost zero electron affinity give reason.

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  5. Which among the halogens would you expect to have the least electroneg...

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  6. Arrange the following elements in the increasing order of non - metall...

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  7. Give reason for the following statement. Halogens act as good oxidisin...

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  8. Write notes on triads and periods.

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  9. Write a note about chancourtois classification .

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  10. Mention the names of the elements with atomic number 101 ,102,109 and ...

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  11. Write any two characteristic properties of alkali metals.

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  12. Account for the fact that noble gases exhibit low chemical reactivity.

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  13. What are semi - metal ? Give example.

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  14. What are periodic properties ? Give example.

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  15. Define ionic radius.

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  16. Electron gain enthalpy values

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

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  18. Define valency . How is it determined ?

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  19. Why there is a need for classification of elements?

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  20. What are the reasons behind the Moseley's attempt in finding atomic nu...

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