The electron affinity of bromine is a negative quantity while it is a positive quantity for krypton, using the electron configurations of the two elements, how would you explain the difference?

Here’s what’s going on here.
First of all, make sure that you have clear understanding of what negative electron affinity means.
As you know, electron affinity is defined as the energy released when one mole of electrons in add to one mole of atoms in the gaseous state.
##color(blue)(“X ” + ” e”^(-) -> ” X”^(-) + “energy”)##
Now, by convention, energy released is considered to be negative. This means that when adding an electron to an atom releases energy, electron affinity will actually be listed as a positive value.
##E_”a” = -DeltaE##
When electron affinity is negative, it implies that adding an electron to an atom actually requires energy.
So if you go by the sign convention, the electron affinity of bromine is actually positive because energy is being released when you add an electron to bromine.
On the other hand, krypton’s electron affinity is actually negative beause you need to provide energy to add an electron to akrypton atom.
So why is that the case?
The key lies indeed with the of the two atoms, which looks like this – I’ll use the
##”Br: ” [“Ar”] 3d^10 color(red)(4)s^2 color(red)(4)p^5##
##”Kr: ” [“Ar”] 3d^10 color(red)(4)s^2 color(red)(4)p^6##
Notice that the outermost energy shell, which for both atoms lies on the fourth energy level, ##n=color(red)(4)##, is completely occupied in krypton’s case.
In other words, krypton has a complete octet – ##8## electrons on its outermost shell.
On the other hand, bromine only has ##7## electrons on its outermost shell, ##2## in the 4s-orbital and ##5## in the 4p-orbital.
Since atoms are expecially stable when they have complete octet, a significant amount of energy will be released when the incoming electron is added to bromine’s outermost shell, thus giving it the aforementioned complete octet.
On the other hand, in krypton’s case, the incoming electron must be added to the next energy level, ##n=5##, which is so energetically unstable that energy must be provided in order to make this happen.
This is why krypton’s electron affinity is negative ##->## you’ll sometimes see it listed as ##0##, like you can see in the above graph.

Don't use plagiarized sources. Get Your Custom Essay on
The electron affinity of bromine is a negative quantity while it is a positive quantity for krypton, using the electron configurations of the two elements, how would you explain the difference?
Just from $13/Page
Order Essay
Calculate the price
Make an order in advance and get the best price
Pages (550 words)
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Upload your instructions
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Homework Mules
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Thank you for your help. I made a few minor adjustments to the paper but overall it was good.
Customer 452591, November 11th, 2021
Thank you very much!! I should definitely pass my class now. I appreciate you!!
Customer 452591, June 18th, 2022
Thank you. I will forward critique once I receive it.
Customer 452467, July 25th, 2020
Thank you for your work
Customer 452551, October 22nd, 2021
Business Studies
Great paper thanks!
Customer 452543, January 23rd, 2023
Political science
Thank you!
Customer 452701, February 12th, 2023
Political science
I like the way it is organized, summarizes the main point, and compare the two articles. Thank you!
Customer 452701, February 12th, 2023
I requested a revision and it was returned in less than 24 hours. Great job!
Customer 452467, November 15th, 2020
Thank you so much, Reaserch writer. you are so helpfull. I appreciate all the hard works. See you.
Customer 452701, February 12th, 2023
Customer reviews in total
Current satisfaction rate
3 pages
Average paper length
Customers referred by a friend
15% OFF your first order
Use a coupon FIRST15 and enjoy expert help with any task at the most affordable price.
Claim my 15% OFF Order in Chat
Live Chat 1 7633094299EmailWhatsApp

Order your essay today and save 15% with the discount code WELCOME