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Why electron gain enthalpy of fluorine is smaller than chlorine?

The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to small size of fluorine atom. 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.

Why second electron gain enthalpy is positive?

When one electron is added to an atom, it becomes negatively charged ions. Now if we add the second electron to this negatively charged ion, it experiences repulsive forces due to the electrons already present in that shell. Hence, the second electron gain enthalpy of an element is positive.

Which has more electron gain enthalpy F or O?

Electron gain enthalpy of F is much more negative than that of O. This is because as we from O to F, the atomic size decreases and nuclear charge increases, thereby increase the attraction of the nucleus for the incoming electron and hence electron gain enthalpy becomes more negative.

Would you expect the second electron gain enthalpy of oxygen?

When an electron is added to O atom to form Oө ion, energy is released. Thus, the first electron gain enthalpy of O is negative. Thus,the second electron gain enthalpy of oxygen is positive.

Which out of the N or O has higher negative electron gain enthalpy?

Answer. -The electronic configuration of O is 2s,2p4 so it has a tendency to donate one electron and thus its electron gain enthalpy is negative. -Whereas the electronic configuration of nitrogen is 2s2 2p3, it has half filled p shell which is a stable configuration and is difficult to remove an electron from it.

Which has more negative electron gain enthalpy?

Hence, electron gain enthalpy becomes more and more negative in a period from left to right. Halogens have the most negative electron gain enthalpy.

Why oxygen has less electron affinity than Sulphur?

Due to small size and high electron density of oxygen compared to sulphur interelectronic repulsion is higher in oxygen resulting in less energy being released when an electron is added to oxygen due to lesser stability after electron is added which is due to the interelectronic repulsion in the small oxygen atom.

Why electron gain enthalpy of Mg and P are almost zero?

As you can see Magnesium have fully filled subshell and Phosphorus have half filled. Fully filled and half filled shells are so much stable that it leads high amount of energy to make electron enter. That’s why EGE is almost 0.

What is the electron gain enthalpy of carbon?

First, as the energy that is released by adding an electron to an isolated gaseous atom….Elements.

Z 6
Element 12C
Name Carbon
Electron affinity (eV) 1.262 122 6(11)
Electron affinity (kJ/mol) 121.776 3(1)

Why electron gain enthalpy of noble gases is positive?

The noble gases present in the group 18 of periodic table, have electronic configuration ns2np6. Thus, in case of noble gases, where it resists the addition of electrons, extra energy is required in order to force the electron to bind to the stable atom. Therefore, making the electron gain enthalpies positive.