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प्रश्न
There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
पर्याय
U
Np
Tm
Fm
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उत्तर
Tm
Explanation:
In the periodic table, actinides lie from atomic number 90 to 103.
Thulium is not an actinide; it is a lanthanide.
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संबंधित प्रश्न
Distinguish between lanthanoid and actinoids.
Why do actinoids show a wide range of oxidation states?
Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.
Compare the chemistry of the actinoids with that of lanthanoids with reference to oxidation states
What is the position of actinoids in periodic table ?
Give reasons for the following:
The chemistry of actinoids elements is not so smooth as that of the lanthanoids.
Identify the CORRECT statement.
Actinoid series begins at ____________ and ends at ____________.
The electronic configuration of Ux+ ion is [Rn]. What is the value of x?
[At. No. of U = 92]
Which among the following actinoids exhibits highest oxidation state +7?
Which of the following properties is NOT of actinoids?
Which among the following elements is radioactive?
The inner transition metals of 5f series are known as ____________.
Which of the following oxidation state is common for all lanthanoids?
Which of the following actinoids show oxidation states upto +7?
(i) Am
(ii) Pu
(iii) U
(iv) Np
Assertion: Actinoids form relatively less stable complexes as compared to lanthanoids.
Reason: Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.
Why do actinoids show variable oxidation states?
