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Which of the following caves is famous for its ancient paintings depicting the Jataka tales?

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Important Questions on Atoms

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Physics>Modern Physics>Atoms>Early Atomic Models

Write the names of the following :

A 15 mya primate that was ape-like.

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Physics>Modern Physics>Atoms>Early Atomic Models
The pair that has similar atomic radii is:
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Physics>Modern Physics>Atoms>Early Atomic Models
Write down the electronic configuration of Pm3+.
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Physics>Modern Physics>Atoms>Early Atomic Models
The brain capacities of which man were between 650-800 cc in course of human evolution?
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Physics>Modern Physics>Atoms>Early Atomic Models

Write the names of the following:

A 2 mya primate that lived in East African grasslands.

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Physics>Modern Physics>Atoms>Early Atomic Models
What are the different oxidation states exhibited by lanthanoids?
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Physics>Modern Physics>Atoms>Early Atomic Models
Why europium (II) is more stable than Cerium (II)?
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Physics>Modern Physics>Atoms>Early Atomic Models
The most common oxidation state of lanthanoids is +3
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Physics>Modern Physics>Atoms>Early Atomic Models
Write down the electronic configuration of  Lu2+.
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Physics>Modern Physics>Atoms>Early Atomic Models
The paramagnetic behaviour of lanthanoids can easily be explained on the basis of the electron spin.
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Physics>Modern Physics>Atoms>Early Atomic Models
Although +3 is the characteristic oxidation state for lanthanoids but cerium also shows +4 oxidation state because _____.
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Physics>Modern Physics>Atoms>Early Atomic Models
Lanthanoids dissolve in warm water to liberate hydrogen.
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Physics>Modern Physics>Atoms>Early Atomic Models
Write down the electronic configuration of Pm3+.
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Physics>Modern Physics>Atoms>Early Atomic Models
Which of the following pairs is chemically similar?
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Physics>Modern Physics>Atoms>Early Atomic Models
A: La (Z = 57) is a d-block element of group 3 of the periodic table.

R: All Lanthanoids belong to the group 3 of the periodic table.
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Physics>Modern Physics>Atoms>Early Atomic Models
The correct increasing order of ionic radii of the following Ce3+,  La3+, Pm3+ and Yb3+ is
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Physics>Modern Physics>Atoms>Early Atomic Models
What are inner transition elements? Decide which of the following atomic numbers are the atomic numbers of the inner transition elements: 29, 59, 74, 95, 102, 104
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Physics>Modern Physics>Atoms>Early Atomic Models
Name the members of the lanthanoid series which exhibit +4 oxidation states and those which exhibit +2 oxidation states. Try to correlate this type of behaviour with the electronic configurations of these elements.
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Physics>Modern Physics>Atoms>Early Atomic Models
The percentage of lanthanides and iron, respectively, in Misch metal are
MEDIUM
Physics>Modern Physics>Atoms>Early Atomic Models
Use Hund’s rule to derive the electronic configuration of Ce+3 ion and calculate its magnetic moment on the basis of ‘spin-only’ formula.