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Among C,N ,B and O which element has the...

Among C,N ,B and O which element has the highest ionization potential and which element has the lowest ionization potential . Give reason.

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Element having highest ionization potential is N. Due to extra stability of half filled 2p orbital. Element having lowest ionization potential is B. Due to shielding effect of completely filled 2s orbital.
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SUBHASH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -TWO marks questions and answers
  1. Among C,N ,B and O which element has the highest ionization potential ...

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  2. Which is the most electronegative element and the most electropositive...

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  3. Which of the following two elements belong i) the same group ii) same ...

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  4. What is ionization energy ? How does it change in a period as well as ...

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  5. What is electron negativity ? How does it change in a period as well a...

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  6. Show that Cl, Br, I is a triad or not ?

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  7. To which blocks do the elements with following atomic number belong ? ...

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  8. How does covalent radii vary in a period as well as in a group in the ...

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  9. What are s,p,d and f block elements ?

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  10. Give four characteristics of s-block elements.

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  11. Give four defects of Mendeleev's periodic table.

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  12. Give two reason , why the number of elements in first period is only 2...

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  13. On the basis of their electronic configurations, explain why alkali m...

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  14. Give the order in which the melting points of halides of sodium decrea...

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  15. Why are group I elements called alkali metals and group 17 are called ...

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  16. Give four characteristics of d-block elements.

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  17. Give any two features of Mendeleev's periodic table.

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  18. How does the solubility of a solute vary with increase in temperature ...

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  19. Why is melting point of LiCl lower than NaCl ?

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  20. Arrange the following in increasing order : BeCO(3),BaCO(3),CaCO(3),...

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