[Q Solved] Frequently Asked Questions on Electron Affinity Of Bromine

 I have answered the most frequently asked questions on the electron affinity of bromine. All of these questions are are very important and will really be helpful to understand the concepts of electron affinity

What Is The Reaction That Corresponds To The Electron Affinity Of Bromine, Br?


A. Br(M)           →Br+ (g) + e- 


B. Br(g) + e-     → Br- (g) 


C. Br2(g) + e-   → Br2-(g) 


D. Br2(g)          → 2Br+(g) + 2e- 


E. Br+(g) + e-   → Br(g)


Answer to What Is The Reaction That Corresponds To The Electron Affinity Of Bromine, Br?

As we know that the electron affinity of an element is the energy change that is involved in adding an electron to a neutral gaseous atom.

So according the aforementioned statement, there is only one probable option given.

The answer will be option B.

Which One Has Greatest Electron Affinity Bromine Or Iodine?

Bromine and Iodine are both members of the Halogen group. They both have a tendency to attain the noble gas configuration, as they both lack a single electron for their electron configurations to be isoelectronic with the nearest noble gas.

Bromine lies on the fourth period in the periodic table. It has the atomic number 35.

The numerical value of the electron affinity of Bromine is -325 kJ mol-1.

According to the trend of electron affinity, the electron affinity values becomes less negative as we move down a group.

So, as Iodine lies on the fifth period, and has the atomic number 53. It has a lower electronegative value. 

Numerically the value of electron affinity of Iodine is equal to -295 kJ mol-1.

So from the above evidence we can see that Bromine has the higher electron affinity value than iodine.

This also answers questions like explain why iodine has a lower electron affinity than bromine or why does chlorine have a greater electron affinity than bromine.


Why Does Bromine Have A Stronger Electron Affinity Than Sulfur?


Bromine as we know is part of the Halogen group of elements whereas Sulfur is part of the Oxygen Family.

Bromine and Sulfur are parts of different groups.

Moreover, Bromine lies in the fourth period and Sulfur lies in the third period.

Value of electron affinity increases across a period and decreases down a group.

With this information we can understand why Sulfur has a weaker electron affinity than Bromine.

Numerically the electron affinity value of Sulfur is -200 kJ mol-1 and electron affinity of Bromine is -325 kJ mol-1.

Which Has A Higher Electron Affinity Bromine Or Fluorine?

Fluorine and Bromine are the members of group 17 the halogens. Fluorine lies on the second period whereas bromine lies on the fourth period.

As electron affinity decreases down the group. Fluorine has a higher electron affinity when compared to Bromine.

Numerically the electron affinity value of Fluorine is -328 kJ mol-1 and that of Bromine is -325 kJ mol-1.

Why Is The Electron Affinity For Bromine A Negative Quantity?

The electron affinity of Bromine is a negative quantity mostly because of its electronic configuration, which is one of the factors that affect electron affinity.

As Bromine does not possess a stable electronic configuration. This applies to all the elements of the Halogen family. 

The elements of the halogen family have a very high negative electronic configuration because they are short of one electron to attain the nearest noble gas configuration and thus they have a very strong tendency to add an electron in order to attain the nearest noble gas configuration.

Which Would Have The More Negative Electron Affinity, The Bromine Atom Or The Br- Ion?

By now we know that the halogens have the highest negative electron affinity due to the fact that they have the tendency to accept electrons in order to achieve the stable electronic configuration of the next noble gas.

Now the question arises whether the Bromine atom has a higher negative electron affinity or the mono negative bromine ion.

To understand this question a basic understanding of successive electron affinity is required.

According to the studies, Bromine atom has a higher negative electron affinity than that of mono negative bromine atom.

It has been found out that, when an electron is added to mono negative gaseous ion, the process is endothermic, i.e. energy is absorbed. Therefore, the second electron affinity of an element is always positive.

Conclusion


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