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What are periodic properties ? Give exam...

What are periodic properties ? Give example.

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The term periodicity of properties indicates that the elements with similar properties reappear at certain regular intervals of atomic number in the periodic table. Example: (i) Atomic radii (ii) Ionisation energy (iii) Electron affinity (iv) Electronegativity.
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Additional Questions(2 MARK QUESTIONS)
  1. What are lanthanides and actinides?

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  2. What are semi - metal ? Give example.

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  3. What are periodic properties ? Give example.

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  4. Define ionic radius.

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  5. Cationic radius is smaller than its corresponding neutral atom. Justif...

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  6. Anionic radius is higher than the corresponding neutral atom. Give rea...

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  7. What are isoelectronic ions ? Give examples.

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  8. Define lonization energy. Give its unit.

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  9. Ionization energy of beryllium is greater than the ionization energy o...

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  10. Ionization energy of nitrogen is greater than the ionization energy of...

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  11. Define electron gain enthalpy or electron affinity. Give its unit.

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  12. Electron gain enthalpy is F is less negative than Cl Why ?

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  13. Electron affinity of oxygen is less negative than sulphur. Justify thi...

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  14. Explain about the factors that affect electronegativity.

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  15. Explain about periodic variation of electronegativity across a period.

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  16. Explain about the period variation of electronegativity along a group.

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  17. Define valency . How is it determined ?

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  18. What is the basic difference in approach between Mendeleev's periodic ...

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  19. On the basis of quantum numbers, justify that the sixth period of the ...

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

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