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What is electron negativity ? How does i...

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

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The ability of attract the shared electron pair (of a covalent bond) in a molecule towards itself is called electro negativity . In a period from left to right the electronegativity increases . Down a group electronegativity value decreases.
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SUBHASH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -TWO marks questions and answers
  1. Which of the following two elements belong i) the same group ii) same ...

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

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

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

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

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

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

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  8. Give four characteristics of s-block elements.

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

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

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

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

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

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  14. Give four characteristics of d-block elements.

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

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

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

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

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  19. Arrange the following in increasing order : BeCl(2),BaCl(2),SrCl(2),...

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  20. Which alkali metal carbonate is thermally unstable and why ?

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