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What is covalent radius ? . How would yo...

What is covalent radius ? . How would you determine the covalent radius of chlorine atom .

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The distance between the nuclei of two covalently bonded atoms is known as covalent distance or inter-nuclear distance. The one-half of this inter-nuclear distance is called covalent radius. The covalent distance (Cl-Cl) of Cl, mol ecule is experimentally found as 198 pm (1.98 A). Its covalent radius is 99 pm `(0.99oversetoA)`
. CI-CI Inter nuclear distance =`1.98 oversetoÅ`
`therefore r_(Cl)=1.98//2=0.99oversetoÅ`.
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Additional Questions(3 MARK QUESTIONS)
  1. Explain about the characteristic of non - metals.

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  2. Periodic change in electronic configuration is responsible for the phy...

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  3. What is covalent radius ? . How would you determine the covalent radiu...

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  4. Define metallic radius.

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  5. Arrange Na^(+),Mg^(2+) and Al^(3+) in the increasing order of ionic ra...

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  6. Arrange the ions F^(-),O^(2-) and N^(3-) in the increasing order of th...

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  7. Mention some characteristics of ionization energy.

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  8. Why ionization energy and electron affinity are calculated in gaseous ...

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  9. How does the shielding effect caused by inner electrons affect the ion...

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  10. Ionization energy of Mg is greater than that of Al. Why?

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  11. What are factors which influence the electron gain enthalpy ?

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  12. Give the general variation of electron gain enthalpies in the periodic...

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  13. Explain about the electronegativity and non-metallic character across ...

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  14. Prove that valency is a periodic property.

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  15. Write a note about periodic trends and chemical reactivity.

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

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  17. What are the various factors due to which the ionization enthalpy of t...

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  18. Which of the following pairs of elements would have more negative elec...

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  19. Would you expect the second electron gain enthalpy of O as positive, m...

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  20. What are major differences between metals and non-metals?

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