pls.explain why fluorine has less negative electron gain enthalpy than chlorine.
Even though Fluorine has the highest electronegativity among all the elements and it should have the highest electron gain enthalpy among all the halogens but
this is an exception and chlorine has higher electron gain enthalpy than Fluorine.
The reason for this is that the size of Fluorine atom is very small and hence there is very high inter-electronic repulsion among the electrons of fluorine.
This makes incoming of another electron not very favourable.
Even though fluorine has large negative electron gain enthalpy but for chlorine its even more negative.
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the size of flourine is small comparatively to chlorine. so when an electron is added in the flourine atom, it will suffer more electron-electron repulsion as all the electrons will be very close to each other. and hence, the electron gain enthalpy of chlorine is more negative than that of flourine
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The size of Flourine is small comparatively to Chlorine. so when an electron is added in theFlourineatom, it will suffer more electron-electron repulsion as all the electrons will be very close to each other. And hence, the electron gain enthalpy ofChlorineis more negative than that ofFlourine
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and that of cholrine is 1s2,2s2,2p6,3s2,3p5
with how much ease the electron is added will result to more negative value of electron gain enthalpy
so as u can see in above in 3p5 is bigger and less elctronic repusion compared to 2p5 hence 3p5 means chlorine has more negative value of electron gain enthalpy
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1)due to small size of fluorine atom
2)there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine
3)the incoming electron does not experience much attraction.
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Since the 2p subshell is respectively small as compared to 3p subshell , the added eletron in small 2p subshell experiences strong intereletronic repulsions in comparison to that in 3p subshell in CL. As a result , the incoming eletron does not feel much attraction from the nucleus and therefore the eletron gain enthalapy of F is less negative than that of CL.
I hope guyzz this ans. Is helful for you.
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Since the 2p-subshell is relatively small as compared to 3p-subshell, the added electron in small 2p-subshell experiences strong inter - electronic - repulsion in comparison to that in 3p subshell in Cl.
As a result, the incoming electron does not feel much attraction from the nucleus and therefor, the electron gain enthalpy of F is less negative than that of Cl
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Hope this will help
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this is an exception and chlorine has higher electron gain enthalpy than Fluorine.?
The reason for this is that the size of Fluorine atom is very small and hence there is very high inter-electronic repulsion among the electrons of fluorine.?
This makes incoming of another electron not very favourable.?
Even though fluorine has large negative electron gain enthalpy but for chlorine its even more negative.
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The reason for this is that the size of fluorine atom is very small and hence there is very high inter-electronic repulsion among the electrons of fluorine.
This makes the incoming of another electron not very favorable.
Even though fluorine has large negative electron gain enthalpy but for chlorine its even more negative.
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The electron gain enthalpy of an element is a measure of the firmness or strength with which an extra electron is bound to it. It is measured in?electron volts per atom or kJ per mole. It can be an endothermic or?exothermic?reaction when you add an electron to the atom.
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Some Facts about Electron Gain Enthalpy
Energy is released when an electron is added to the atom. Therefore, the electron gain enthalpy is?negative.
The?electron gain enthalpy for halogens is highly negative?because they can acquire the nearest stable noble gas configuration by accepting an extra electron.
Noble gases have large positive electron gain enthalpy. This is because the extra electron is placed in the next higher principal quantum energy levels. Thus, a highly unstable electronic configuration is produced.
Now the main reason why flurine has less electron gain enthalpy than chlorine because,
The negative?electron gain enthalpy?of?fluorine is less than?that ofchlorine. It?is?due to small size of?fluorineatom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of?fluorine?and thus, the incoming?electron?does not experience much attraction.
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this is an exception and chlorine has higher electron gain enthalpy than Fluorine.
The reason for this is that the size of Fluorine atom is very small and hence there is very high inter-electronic repulsion among the electrons of fluorine.
This makes incoming of another electron not very favourable.
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Now, Adding an electron would cause much repulsion in fluorine because we will add an electron in 2p subshell while in Chlorine that electron would be added in 3p subshell hence less inter electronic repulsion in Chlorine and more electron gain enthalpy.
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