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Write the electronic configurations for the elements with atomic number 15, 21 and 37. To which blocks in the periodic table do these elements belong ?

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MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -REVISION EXERCISE (VERY SHORT ANSWER QUESTIONS (CARRYING 2 OR 3 MARKS))
  1. Name the different blocks of elements in the periodic table. Give the ...

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  2. What are transition elements ? Which of the following are not transiti...

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  3. Write the electronic configurations for the elements with atomic numbe...

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  4. Predict the periods and blocks to which each of the following elements...

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

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  6. Which element has the lowest first ionization energy?

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  7. Which of the following electronic configurations has the lowest value ...

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  8. Mg^(2+) is smaller than O^(2-) in size, throgh both have same electron...

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  9. The five successive energies of an element are 800, 2427, 3658, 25024 ...

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  10. How would you explain the fact that the first ionization enthalpy of L...

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  11. Describe the theory associated with the radius of an atom as it a. g...

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  12. What are the major differences between metals and non-metals?

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  13. Write the general outer electronic configuration of s-,p-,d- and f-blo...

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  14. The increasing order of reactivity among group 1 elements is LiltNaltK...

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  15. ELECTRON GAIN ENTHALPY

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  16. How does atomic radius of an element vary across a period fr...

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  17. Statement-1: The atomic radii of the elements of the oxygen family are...

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  18. What are isoelectronic ions ? Account for the decrease in size of the ...

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  19. Ionisation Enthalpy

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  20. Fe^(2+) and Fe^(3+) can be distinguished by

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