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There are 14 elements in actinoid series...

There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

A

U

B

`N_(p)`

C

`Tm`

D

Fm

Text Solution

Verified by Experts

The correct Answer is:
c
Actinoid series is with atomic nos. 90 to 103. Thulium (Tm ) has atomic no. 69.
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PRADEEP-D- AND F-BLOCK ELEMENTS-NCERT EXEMPLAR PROBLEMS(MULTIPLE CHOICE QUESTIONS)
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  2. Metallic radii of some transitions element are given below. Which of t...

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  3. Generally transition elements from coloured salts due to the presence ...

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  4. On addition of small amoung of KMnO(4) to concentrated H(2)SO(4), a gr...

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  5. The magnetic nature of elements depends on the presence of unpaired el...

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  6. Which of the following oxidation state si common for all lanthanoids?

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  7. Which of the following reactions are disproportionation reaction ?

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  8. When KMnO(4) solution is added to oxalic acid solution , the decolouri...

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  9. There are 14 elements in actinoid series. Which of the following eleme...

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  10. KMnO(4) acts as an oxidising agent in acidic medium. The number of mol...

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  11. Which of the following is amphoteric oxide? Mn(2)O(7),CrO(3),Cr(2)O(...

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  12. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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  13. Interstitial compounds are formed when small atoms are dropped under t...

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  14. The magnetic moment is associated with its spin angular momentum and o...

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  15. KMnO(4) acts as on oxidising agent in alkaline medium. When alkaline K...

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  16. Which of the following statements is not correct ?

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  17. When acidified K(2)Cr(2)O(7) solution is added to Sn^(2+) salts then S...

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  18. Higher oxidation state of manganese in fluoride is +4 (MnF(4)) but hig...

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  19. Although zirconium belongs to 4d transition series and hafnium to 5d t...

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  20. Why HCl not used to make the mdeium acidic in oxidation reactions of K...

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