Electron affinity: period trend | Atomic structure and properties | AP Chemistry

No video

Electron affinity: period trend | Atomic structure and properties | AP Chemistry | Khan Academy

Рет қаралды 313,923

Күн бұрын

Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now: www.khanacadem...
Electron affinity is the energy change that results from adding an electron to a gaseous atom. For example, when a fluorine atom in the gaseous state gains an electron to form F⁻(g), the associated energy change is -328 kJ/mol. Because this value is negative (energy is released), we say that the electron affinity of fluorine is favorable. View more lessons or practice this subject at www.khanacadem...
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Donate or volunteer today! Donate here: www.khanacadem...
Volunteer here: www.khanacadem...

Пікірлер: 95

@joshporter7480 6 жыл бұрын

My mind is fried bc my chem teacher sucks at teaching and apparently I've learned nothing from her classes the past two years.

@Chroamina 5 жыл бұрын

Josh Porter oh yeah yeah

@praneelsuryavanshi4175 4 жыл бұрын

was she 🔥🔥🔥

@sarveshwarianbarasu 4 жыл бұрын

@@Chroamina 2years is quite long tho!!

@izuku8474 3 жыл бұрын

Easy money for her

@champadevi2581 3 жыл бұрын

God i have the same problem I am in clg 2nd year and I still don't have my basics cleared. So, about 4 years now

@vanidasari7542 11 ай бұрын

my teacher was an stealer she won't clarify our doubts but takes fees so i learn chemistry in youtube i did not understand electron affinity this video clarified all doubts of mine you deserve a bright future

@maripaz5650 3 жыл бұрын

So good, didn't take AP chem but this makes a lot of sense!

@SAU_Islamic_Community 4 жыл бұрын

It cleared my idea about E.affinity... Thanks brother.

@rishabh645 4 жыл бұрын

love it,i was't able to understand after attending 2 classes and watching a online video twice but ,khan academy made it clear

@aishwaryagupta222 3 жыл бұрын

Rishabh mohan?

@Adwaay 2 жыл бұрын

@@sushmathakur2222 Sushma Thakur?

@Adwaay 2 жыл бұрын

@@sushmathakur2222 sushma thakur????

@ujwalj7001 Ай бұрын

I will explain Electron Affinity in simple terms - i guarantee it is easy to understand First understand Ionisation energy - it is the energy required to make an atom lose it's electron So u need to kick out an electron from it's orbit - it won't happen on it's own - go give some energy to it. The energy u gave or the energy required for removal of an electron is called ionisation energy. - EASY, nothing complicated Now electron affinity is the straight opposite - yes it is the opp. Screw what google or Chat GPT is saying U gave an energy to remove electron. So for the opposite case: U will get an energy to add an electron. That is, the atom loses some of it's energy to attract electron nd hold it in it's place. Just the opposite. The more the ionisation energy is required to remove an electron (like in the case of noble gases), the less they r going to easily lose an electron For Electron affinity it is the opposite, the greater the energy is released or the more electron affinity it has, the faster it is going to attract electrons or greater the no. of electrons attracted. That's it - Electron affinity explained in simple terms. Now i am not sure it is completely correct in terms of advanced level of science. But for general understanding it is great way to visualise nd is correct.

@sauravsharma8461 3 жыл бұрын

Divided by nations , United by learning !

@ashrithaammmmm1111 2 жыл бұрын

this literally helped so much. thank you khan academy. gonna go and ACE my test bye 🏃‍♂️🏃‍♂️🏃‍♂️

@user-rp1nz7cy3s 6 жыл бұрын

Yet I don't understand why energy is released when an electron is added!

@anoosha9768 6 жыл бұрын

mariam bassam because a free electron is more energetic as compared to valence shell electrons. So in order to become a part of the valence shell, the electron must lose energy to become a part of that shell.

@saratb1875 5 жыл бұрын

Anoosha Iftikhar thank you so much 😍

@shahdmahmoud4214 5 жыл бұрын

+Anoosha Thank you so much really❤

@nahidawani7158 5 жыл бұрын

@@anoosha9768 thank you 😍

@haifa6367 4 жыл бұрын

Anoosha wow I love you

@mjn0052 3 жыл бұрын

Khan academy has been ready for Covid19 since 2017

@GreAse0MonKey27 Жыл бұрын

"So, I'll start with a lithium atom. And in a neutral lithium atom there are 3 protons so there is our +3 charge and the electronic configuration of a neutral lithium atom is 1s2 2s1." I heard this line in starting of every video made by this guy.. He loves LITHIUM accurately A NEUTRAL LITHIUM ATOM!!

@magdalenamozdzierz7546 6 жыл бұрын

Awesome. Great Visual Explanation!

@swatidwivedi4029 6 жыл бұрын

Thank you so much sir. You made so many points clear :D

@vtron9832 7 жыл бұрын

WHERE IS SALMAN KHAN!?!?

@sauravsharma8461 3 жыл бұрын

Infinite thanks...!!!!

@Sadhna2001 6 жыл бұрын

So helpful video.... Thanks khan academy

@13371138 Жыл бұрын

Patton Oswald is a great chem teacher

@melissarainchild 4 жыл бұрын

Super vid, thanks a lot :)Keep 'em commin' !

@melodykamil 4 жыл бұрын

That was so good!!! thank youuu

@richamaetimtim4539 3 жыл бұрын

Where did the kjs come?

@amritabrije6049 3 жыл бұрын

👍👍 i understand

@shameul_a_arnob 3 жыл бұрын

Thank you...

@jocelbreton.k.9776 2 жыл бұрын

It's very fine en clear

@anneclarence1704 6 жыл бұрын

I'm sorry, I'm just wondering, wasn't Zeff supposed to be # of protons - # of core electrons? In other words, should've it been 10 - 2 (because of electrical configuation, 2, 8, 18, 32)? Also, how did you find the "shileding" electron?

@malhar7347 5 жыл бұрын

See here's how it is ... You have a neon atom with 10 electron you try to add one electron well protons will attract the electron towards it but all the other elctrons tend to repel it as they have like charges so. Here core elctrons means all the elctrons of an atom not only of first orbit. But all the orbits..

@alexfontaine6233 Жыл бұрын

I thought energy was released when you lose an electron so now energy is released again when you gain an electron? If the energy is given off then the atom would lose that energy and be neutral again right? so are electrons just energy and not matter?

@RuthBingham 5 жыл бұрын

Does lithium (EA = -60) every really form an anion? I am accustomed to the idea of a lithium cation, but not anion.

@mukulgidney 6 жыл бұрын

If nitrogen doesn't have an affinity for an electron then why doesn't a carbon atom also have its electron affinity as zero. Doesn't carbon also have 4 half filled orbitals?

@leonmozambique533 5 жыл бұрын

Mukul Singal the electron in the 2s orbital doesn’t go up to the p orbital

@rohitgoyal8051 7 жыл бұрын

why boron has less electron affinity than lithium

@ejazperhar3792 5 жыл бұрын

Li has larger atomic size as compared to boron and B has greater nuclear charge effect.

@darkstromx1465 3 жыл бұрын

But what's the need of electron affinity , when we can do well with electron gain enthalpy as it is according to thermodynamic convention.......

@shanthielizabeth648 4 жыл бұрын

i have one doubt .....so when we add an electron to lithium which has the configuration 1s^2 2s^1 its configuration changes to Li^-1 so Li^-1 configuration looks like beryllium ...so ...when I find an atom in nature while im in a kind of a research(just a thought) ...with the configuration of 1s^2 2s^2........ is it beryllium or Li^-1 ????????? pls help !!!!!!!!!

@sarveshwarianbarasu 4 жыл бұрын

These elements can not be found simply as li and beryllium in nature ,it must be in form of oxides or sulphides or other forms so it may vary according to the state of combination it is present

@shanthielizabeth648 4 жыл бұрын

@@sarveshwarianbarasu thank you mam !!!! doubt cleared

@abdelmoumenederoueche369 6 жыл бұрын

Thank you:)

@frederickkusi2805 7 жыл бұрын

what program do you use to draw on the board

@arnabsarkar6041 7 жыл бұрын

Graphic Tablet is used to draw :) U can find application www.educatorstechnology.com/2015/02/best-whiteboard-apps-for-teachers.html

@luckyman1440 7 жыл бұрын

Why do electrons give energy in the first place when added to an atom?

@harshwardhan509 6 жыл бұрын

Whatever queries you have you can go and comment on PROFESSOR DAVE EXPLAINS video and he will answer you within a couple of hours. But he will.......I got many of mine cleared from him :)

@malhar7347 5 жыл бұрын

Cause a free electron has a more energy or it is at higher state than all the other elctrons of atom so for the electron to be added some eenrgy has to be given out so that it is stable

@ashutoshardu 7 жыл бұрын

but energy will be required for adding an electrons to an atom in electron affinity

@rubinaalmas170 6 жыл бұрын

Ashutosh A ... electron affinity means the amount of Energy released to add a electron in neutral gaseous atom ......in ionization potential energy will be required to remove an electron from a neutral isolated gaseous atom

@james_n_jam8463 2 жыл бұрын

Yes

@avni7948 6 жыл бұрын

You should show us how to arrange in order (increasing or decreasing)..... Not so good

@khaledawad9741 2 жыл бұрын

I am more confused now... so Li requires energy to become 1+? I thought the reaction of Li is exothermic not endothermic

@FreyMayBeHere 2 жыл бұрын

Well from my understanding, as there is a high amount of attraction between the outer most electron and the nucleus (due to small atomic radius and little electron shielding), a lot of energy would be required to rip that electron away. Or another way of looking at it would be to say that a lot of energy would be needed to break the electrostatic bond between the two. This is for the ionisation of Lithium.

@Mourad_balbal 6 жыл бұрын

You made a mistake on Z effective of Ne of the electron 3s1 it's not 0 it's 1.3 !!!!!! (Slater rules)

@aaronlopez3465 7 жыл бұрын

Soooo confusing o_o

@vitalchic9298 3 жыл бұрын

Where’s the other khan academy guy?

@vigneshshah2360 5 жыл бұрын

Liked...😎

@VirgoINFP 6 жыл бұрын

What's the definition of electron affinity?

@user-rp1nz7cy3s 6 жыл бұрын

Sally Chan The amount of energy released when a neutral gaseous atom aquires one electron

@yannickkonan8160 4 жыл бұрын

Thé lithium affinity is positive

@talhakuzucuoglu1712 3 жыл бұрын

no its not

@rupapandey2385 5 жыл бұрын

Told wrong li- lithium anoin is smaller than li ok dude

@FreyMayBeHere 2 жыл бұрын

@Mohammad Nematzadehgharakheil if it's an anion then it's (-) and therefore the lithium anion is not smaller but larger than the lithium atom.

@isratbieber1462 6 жыл бұрын

Not understand

@ameymorshed4744 7 жыл бұрын

Did anyone realize that nobody disliked this video

@linhuichi937 7 жыл бұрын

lol someone always has to hate for no reason

@wokoharamuniversity5582 7 жыл бұрын

Lin Huichi, you are absolute right.

@wokoharamuniversity5582 7 жыл бұрын

Arrian Morshed , 2 dislikes by 2 lunatics

@lulucorona6211 7 жыл бұрын

Gorros dinosaurios

@rohitgoyal8051 7 жыл бұрын

xue 717 tell us who is more talented than him then only we can believe

@isratbieber1462 6 жыл бұрын

plz talk bangla

@ameymorshed4744 7 жыл бұрын

Now people disliked this video

@chelsea2807 6 жыл бұрын

Not a good explanation