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प्रश्न
Assertion: There is a continuous increase in size among Lanthanoids with an increase in atomic number.
Reason: Lanthanoids do not show Lanthanoid contraction.
पर्याय
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true but Reason is not the correct explanation for assertion.
Assertion is true but Reason is false.
Both Assertion and Reason are false.
उत्तर
Both Assertion and Reason are false.
APPEARS IN
संबंधित प्रश्न
What are lanthanoids?
Account for the following :
Zr and Hf have almost similar atomic radii.
Compare the chemistry of actinoids with that of the lanthanoids with special reference to chemical reactivity.
Name the members of the lanthanoid series which exhibit +4 oxidation state and those which exhibit +2 oxidation state. Try to correlate this type of behavior with the electronic configurations of these elements.
The f-block elements are known as ____________.
On the basis of Lanthanoid contraction, explain the following:
Radii of 4d and 5d block elements.
Zr(Z = 40) and Hf(Z = 72) have similar atomic and ionic radii because of ______
Write any two consequences of Lanthanoid Contraction.
Write a note on lanthanoids.
Why is Mn2+ ion more stable than Fe2+ ion?
(Atomic numbers of Mn = 25 and Fe = 26)
