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Which element do you think would have be...

Which element do you think would have been named by (a) Lawrence Berkeley laboratory and (b) Seaborg's group?

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(i) Lawrencium (Z= 103) and Berkelium (Z= 97) (ii) Seaborgium (Z=106)
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PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -NCERT (Questions and exercise )( NCERT EXERCISES)
  1. In terms of period and group where would you locate the element with Z...

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  2. Write the atomic number of the element present in the third period and...

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  3. Which element do you think would have been named by (a) Lawrence Berke...

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  4. Why do elements in the same group have similar physical and chemical p...

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  5. What do atomic radius and ionic radius really mean to you?

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  6. How do atomic radii vary in a period and in a group ? How do you...

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  7. What do you understand by isoelectronic species ? Name a species that ...

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  8. Consider the following species: N^(3-),O^(2-),F^(ө),Na^(o+),Mg^(2+) ...

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  9. Explain why cations are smaller and anions larger in radii than their ...

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  10. What is the significance of the terms-'isolated gaseous atom' and 'gro...

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  11. Energy of an electron in the ground state of the hydrogen atom is -2.1...

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  12. Among the second period elements the actual ionisation enthalpies are ...

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  13. How would you explain the fact that the first ionisation enthalpy of s...

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  14. What are the various factors due to which the ionisation enthalpy of t...

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  15. The first ionization enthalpy values (in Kj mol^(-1)) of group 1...

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  16. Which of the following pairs of elements would have a negative e...

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  17. Would you expect the second electron gain enthalpy of O as positive, m...

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  18. What is the basic difference between the terms electron gain enthalpy ...

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  19. How would you react to the statement that the electronegativity of N o...

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

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