IE(2) > IE(1) for a given element - why?...

`IE_(2) > IE_(1)` for a given element - why?

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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Important Questions

What is diagonal relation? Give one pair of elements, that have this r...
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Radii of iron atom and its ions follow Fe > Fe^(2+) > Fe^(3+) - explai...
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IE(2) > IE(1) for a given element - why?
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What is lanthanide contraction? Give one of its consequences.
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Select in each pair, the one having lower ionization energy and explai...
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IE(1) of O < IE(1) of N but IE(2) of O > IE(2) of N - Explain.
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Na^(+) has higher value of ionization energy than Ne, though both have...
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Electron affinity of chlorine is more than that of fluorine explain.
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Arrange the following in order of increasing ionic radius : (a) Cl^(...
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Arrange the following in order of increasing ionic radius : (b) Al^(...
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Arrange the following in order of increasing ionic radius : (c ) Na^...
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Mg^(+2) is smaller than O^(-2) in size, though both have same electron...
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Name the element with highest ionization enthalpy.
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Name the family with highest value of ionization enthalpy.
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Which element possesses highest electron affinity?
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Name unknown elements at the time of Mendeleef.
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Name any two typical elements.
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On the basis of quantum numbers, justify that the 6^(th) period of the...
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Why f-block elements are placed below the main table.
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Give any five of the characteristic properties of transition elements.
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