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Naturally occuring radio active elements...

Naturally occuring radio active elements present in second inner transition series

A

3

B

4

C

5

D

6

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The correct Answer is:
A
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NIKITA PUBLICATION-D-AND F-BLOCK ELEMENTS-MULTIPLE CHOICE QUESTIONS
  1. How many transuranium elements present in 5f series ?

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  2. Synthetic radioactive elements present in actinides are

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  3. Naturally occuring radio active elements present in second inner trans...

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  4. Which of the following is transuranium element ?

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  5. Lanthanide elements are called as rare earth because

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  6. The transuranic elements are prepared by

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  7. Which element is not naturally occuring ?

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  8. Which of the following, is prepared artificially?

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  9. The lanthanide have general electronic configuration

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  10. The outer electronic coonfiguration of cerium is

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  11. Match list I and II and select the correct answer using the code given...

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  12. Which of the following elements shows 6s^(2) , 4f^(7) 5d^(1) electroni...

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  13. Lutetium has electronic configuration

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  14. Gadolinium contain one electron in 5d-orbital due to

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  15. In which of the following elements one electron is present in 5d orbit...

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  16. Which of the following is expected electronic configuration of europiu...

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  17. The expected electronic configuration of cerium is

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  18. How many unpaired electrons present in 4f-orbital of lutetium ?

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  19. As atomic number increases from 57 to 71 in tripositive lanthanon, the...

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  20. The electronic configuration of gaedolinium.

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