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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
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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
How would you account for the following:
The chemistry of actinoids is more complicated as compared to lanthanoids.
How would you account for the following:
Actinoid contraction is greater than lanthanoid contraction.
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 electronic configuration
Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.
Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.
What is the position of actinoids in periodic table ?
How would you account the following :
Highest fluoride of Mn is MnF4 whereas the highest oxide is Mn2O7.
Give reasons for the following:
The chemistry of actinoids elements is not so smooth as that of the lanthanoids.
Choose the most correct option.
In which of the following series all the elements are radioactive in nature?
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?
Identify the CORRECT statement.
The actinoid contraction is attributed to the ____________.
The electronic configuration of Ux+ ion is [Rn]. What is the value of x?
[At. No. of U = 92]
Which among the following elements is radioactive?
Maximum oxidation state exhibited by Chlorine is ______.
What causes actinoid contraction?
