Electron gain enthalpy of fluorine is le...

Electron gain enthalpy of fluorine is less than that of chlorine. Why?

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In F, the new electron to be added goes to 2p- subshell while in C1, it goes to 3p- subshell. Since 2p- subshell in much smaller that 3p- subshell therefore the added electron in F experiences much stronger repulsions from other electron in comparision to that in C1 in other words F does not accept the incoming electron a electron with that ease with which C1 accepts . consequently the electron gain enthalpy of F is less negative than that of C1

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Fluorine has the highest electronegativity among the group on the Pauling scale, but the electron affinity of fluorine is less than that of chlorine because

The atomic number of fluorine is less than that of chlorine

Fluorine being the first member of the family behaves in an unuseual manner

Chlorine can accommodate an electron better than fluorine by untilising its vacant `3d` orbital

Small size, high electron density and an increases electron repulsion make addition of an electron to fluorine less favourable than that in the case of chlorine

Assertion: magnitude of electron gain enthalpy of oxygen is less than that of fluorine but greater than that of nitrogen. Reason: Ionisation enthalpy order is as follows: N gt O lt E .

If both assertion and reason are true annd the reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but the reason is false

if assertion is false but the reason is true

Fluorine has the highest electronegativity among the ns^(2) np^(5) group on the Pauling scale, but the electron affinity of fluorine is less than that of chlorine because

the atomic number of fluorine is less than that of chlorine

fluorine being the first member of the family behaves in an unusual manner

chlorine can accommodate an electron better fluorine by utilising its vacant 3d-orbital

small size, high electron density and an increased electron repulsion makes addition of an electron to fluorine less favourable than that in the case of chlorine.