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Give the general electronic configuratio...

Give the general electronic configuration of lanthanides and actides?

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(i) The electronic configuration of lanthanides is `4f^(1-14) 5d^(0-1)6s^(2)`
(ii) The electronic configuration of actinides is `5f^(1-14) 6d^(0-1)7s^(2)`
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Additional Questions(2 MARK QUESTIONS)
  1. Why d- block elements are known as transition element ?

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  2. What are f-block elements? How many series are there? Why they are cal...

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  3. Give the general electronic configuration of lanthanides and actides?

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  4. What are lanthanides and actinides?

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  5. What are semi - metal ? Give example.

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  6. What are periodic properties ? Give example.

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  7. Define ionic radius.

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

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

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  10. What are isoelectronic ions ? Give examples.

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  11. Define lonization energy. Give its unit.

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

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

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

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

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

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  17. Explain about the factors that affect electronegativity.

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

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

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  20. Define valency . How is it determined ?

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