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Atomic Valency

24. Why Ioniz...

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24. Why Ionization energy of Fluorine is greater than Nitrogen? If it is due to the fact that Fluorine has small size than why we do not consider the fact that Nitrogen has half filled stability?

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Q. Among the second period elements the actual ionization enthalpies are in the increasing order Lithium Boron beryllium carbon oxygen nitrogen fluorine and neon. Then explain why beryllium has higher ionization enthalpy than Boron and oxygen has lower ionization enthalpy than nitrogen and fluorine

Q. Assertion :Nitrogen has higher ionization energy than that of oxygen. Reason: Nitrogen has smaller atomic size than that of oxygen.

Q. Assertion :Dipole moment of

N H_{3}

is greater than that of

N F_{3}

. Reason: Nitrogen is more electronegative than fluorine.

Q. Statement I: Oxygen has a smaller first ionization energy than fluorine.
Because
Statement II: Oxygen has a higher

Z_{e} f f

value than fluorine.

Q. Give reasons for the following:

(a) Oxygen has lower ionisation energy than that of nitrogen.

(b) Electron gain enthalpy of chlorine is more negative than that of fluorine.

O^{2 -}

A l^{3 +}

N a^{+}, F^{-}

M g^{2 +}

in the increasing order of their sizes.

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