List of Posts written during Jun 2021

This is a list of of posts written during the month Jun 2021

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List of Posts

This is the complete list of categories of posts written during Jun 2021. They have been ordered by the publish date, with the most recent first.

  1. Published: 01-Jun-2021
    The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus ?


  2. Published: 01-Jun-2021
    Indicate the number of unpaired electrons in : (a) P, (b) Si, (c) Cr, (d) Fe and (e) Kr.


  3. Published: 02-Jun-2021
    (a) How many subshells are associated with n = 4 ? (b) How many electrons will be present in the subshells having ms value of -1/2 for n = 4


  4. Published: 04-Jun-2021
    On the basis of quantum numbers, justify that the sixth period of the periodic table should have 32 elements.


  5. Published: 07-Jun-2021
    In terms of period and group where would you locate the element with Z =114?


  6. Published: 08-Jun-2021
    Write the atomic number of the element present in the third period and seventeenth group of the periodic table.


  7. Published: 09-Jun-2021
    How do atomic radius vary in a period and in a group? How do you explain the variation?


  8. Published: 11-Jun-2021
    Consider the following species : N3- , O2-, F- , Na+ , Mg2+ and Al3+ (a) What is common in them? (b) Arrange them in the order of increasing ionic radii.


  9. Published: 11-Jun-2021
    Explain why cation are smaller and anions larger in radii than their parent atoms?


  10. Published: 12-Jun-2021
    What is the significance of the terms — 'isolated gaseous atom' and 'ground state' while defining the ionization enthalpy and electron gain enthalpy?


  11. Published: 13-Jun-2021
    Among the second period elements the actual ionization enthalpies are in the order Li < B < Be < C < O < N < F < Ne. Explain why (i) Be has higher ∆i H than B (ii) O has lower ∆i H than N and F?


  12. Published: 14-Jun-2021
    How would you explain the fact that the first ionization enthalpy of sodium is lower than that of magnesium but its second ionization enthalpy is higher than that of magnesium?


  13. Published: 14-Jun-2021
    The first ionization enthalpy values (in kJ mol-1) of group 13 elements are : B Al Ga In Tl 801 577 579 558 589 How would you explain this deviation from the general trend ?


  14. Published: 15-Jun-2021
    Which of the following pairs of elements would have a more negative electron gain enthalpy? (i) O or F (ii) F or Cl


  15. Published: 16-Jun-2021
    Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer.


  16. Published: 18-Jun-2021
    What is the basic difference between the terms electron gain enthalpy and electronegativity?


  17. Published: 19-Jun-2021
    How would you react to the statement that the electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?


  18. Published: 21-Jun-2021
    Describe the theory associated with the radius of an atom as it (a) gains an electron (b) loses an electron


  19. Published: 22-Jun-2021
    Would you expect the first ionization enthalpies for two isotopes of the same element to be the same or different? Justify your answer


  20. Published: 22-Jun-2021
    What are the major differences between metals and non-metals?