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

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

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The elements for which the last electron has entered in s - orbital are called s - block elements.
p-block elements are those for which the last electron has entered in the p - orbital. d-block elements are those in which the last electron has entered the d - orbital . The elements in which the last electron entered into the f - orbital of their atoms are called f - block elements.
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SUBHASH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -TWO marks questions and answers
  1. To which blocks do the elements with following atomic number belong ? ...

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

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

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  4. Give four characteristics of s-block elements.

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

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

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

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

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

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  10. Give four characteristics of d-block elements.

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

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

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

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

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

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

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  17. Out of O and S which has higher negative electron gain enthalpy and wh...

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  18. Predict which atom in each of the following Period has the highest fir...

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  19. Among the elements Li, K,Ca, S and Kr , which one is expected to have ...

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  20. Among the elements of the third period Na to Ar pick out the element: ...

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