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प्रश्न
There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
विकल्प
U
Np
Tm
Fm
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
Give a reason for the following:
Actinoids show irregularities in their electronic configurations.
Write on similarity between the chemistry of lanthanoids and actinoids.
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.
Manganese in the +2 oxidation state is more stable than +3 oxidation state where as iron is stable at +3 oxidation state than +2 oxidation state. Explain why?
Which of the following properties is NOT of actinoids?
Which among the following elements is radioactive?
Which of the following oxidation state is common for all lanthanoids?
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.
The incorrect statement among the following is:
What is actinoid contraction?
