Chlorine has the highest electron affinity among the elements. Its high electron affinity can be attributed to its large atomic radius
What is the most positive electron affinity?
Therefore, chlorine has a higher electron affinity than fluorine, and this orbital structure causes it to have the highest electron affinity of all of the elements.
Which element has the highest electron affinity attracts electrons the most?
All elements are compared to one another, with the most electronegative element, fluorine , being assigned an electronegativity value of 3.98. Fluorine attracts electrons better than any other element.
What are the exceptions to electron affinity?
In general, exceptions arise when new subshells are being filled/half-filled , or in cases where the atom is too small. In the first case, Be and Mg are interesting examples: they have a positive electron affinity (just like N, in fact) because of the energy difference between the s and p subshells.
How do you determine the highest electron affinity?
Unlike electronegativity, electron affinity is a quantitative measurement of the energy change that occurs when an electron is added to a neutral gas atom. The more negative the electron affinity value, the higher an atom’s affinity for electrons.
Which element has the highest electron affinity?
Fluorine . D . Oxygen. Hint: We should remember that the element which will release the most amount of energy on adding an electron in its isolated gaseous atom will posse’s highest electron affinity in the periodic table.
What is the second electron affinity of oxygen?
The required second electron affinity of oxygen is $744.4kJ/mol$ .
Which has higher electron affinity O or SE?
Electron affinity is characterised as when an electron is applied to the atom to form a negative ion, the shift in energy (in kJ / mol) of a neutral atom (in the gaseous phase). ... So, the order of electron affinity must be highest in the oxygen and least in selenium according to electron gain enthalpy.
What is the lowest electron affinity?
Periodic Trends in Electron Affinity
The electron affinities of the noble gases have not been conclusively measured, so they may or may not have slightly negative values. Chlorine has the highest E ea while mercury has the lowest.
Which has the most negative electron affinity?
Fluorine, therefore, has a lower affinity for an added electron than does chlorine. Consequently, the elements of the third row (n = 3) have the most negative electron affinities.
What causes a positive electron affinity?
Electron affinities of the elements
Generally, nonmetals have more positive E ea than metals. ... This is caused by the filling of the valence shell of the atom ; a group 17 atom releases more energy than a group 1 atom on gaining an electron because it obtains a filled valence shell and therefore is more stable.
What do you mean by electron affinity?
1 : the degree to which an atom or molecule attracts additional electrons . 2 : the minimum energy required to remove an electron from a negative ion to produce a neutral atom or molecule.
Which of the following has highest first electron affinity?
So chlorine has highest electron affinity.
What is positive electron affinity?
The electron affinity is defined as the energy change that occurs when an atom gains an electron, releasing energy in the process. ... If a reaction is exothermic , the change in energy is negative. This means that the electron affinity is positive.
What is the correct order of electron affinity?
Therefore, the correct order of electron affinity is Cl > F > Br . Hence, option C is the required answer.
Which element has highest electron gain enthalpy?
Option c) Chlorine . Halogens have the highest electron gain enthalpy.
