Single Choice

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

A$$U$$
B$$Np$$
C$$Tm$$
Correct Answer
D$$Pm$$

Solution

Thulium $$(Tm)$$ has atomic number 69, and actinoid series has elements from atomic number 90-103. Thulium belongs to lanthanoid series . Hence, option C is correct.

SIMILAR QUESTIONS

d - block and f - block Elements

The atomic numbers of elements of second inner transition elements lie in the range of :

d - block and f - block Elements

Which of the following is not an actinide?

d - block and f - block Elements

Which of the following is not an actinoid?

d - block and f - block Elements

Which of the following is not an actinide?

d - block and f - block Elements

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

d - block and f - block Elements

Name two elements in each case : Actinides

d - block and f - block Elements

Which belongs to the actinides series?

d - block and f - block Elements

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

d - block and f - block Elements

General electronic configuration of actinodes is $$ (n-2)f^{1-14} (n-1)d^{0-2} ns^2 $$. Which of the following actinoids have one electrons in $$6d$$ orbitals?

d - block and f - block Elements

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

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