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Why do elements in the same group have s...

Why do elements in the same group have similar physical and chemical properties

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Elements in the same group have similar outer electronic configuration and hence similar physical and chemical properties.
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PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -NCERT (Questions and exercise )( NCERT EXERCISES)
  1. Write the atomic number of the element present in the third period and...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. Would you expect the first ionisation enthalpies for two isotopes of t...

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