A great combination of being very simple and easy to understand (step by step, terms all explained very well), yet energized and quick which helps keep the video more interesting.
Students like myself, if this lecture is helping you like it helped me, I would urge you to donate on this guy's page, you can use paypal and it is very easy, I just did it, we need to support work like these because chemistry is not easy, and these youtube private lessons are worth it!!! I paid a tutor $150 3 hours to get this and still could not get it!!! so do your part spread the word and donate to this dude's site for coffee!?! oh well here is the link: www.aklectures.com/contribute.php
That is very humbling to hear! I never thought that these lectures would bring so much clarity to so many people! Thank you very much for your contribution! Although I do need my caffeine to keep me going with these lectures, I can assure you that your contribution will extend to other, more serious matters (like upgrading the equipment to make more awesome lectures!) Thanks once again! - Andrey
Considering that an atom is not a solid sphere, the atomic radius is an approximation. We talk of electrons orbiting the nucleus in terms of probability and so an electron can be found as far away as you'd like (given that the probability decreases as you go farther). Therefore, no, you cannot take a ruler and measure the radius. But you can approximate it.
Thank you for the kind words. If you go onto my main channel page, you should find my orgnanic chemistry playlist. I believe I have over a hundred videso on different topics in organic chemistry. I will be adding many more in the near future, so stay tuned!
Hey! On my channel page, click the playlist "Organic Chemistry" and find the lecture on "Ionic Bonds". There, I talk more about electron affinity and ionization energy. Let me know if you cannot find it, I will message you the link.
12:57 just want to point out a discrepancy - Lithium's first electron affinity is an exothermic (not endothermic) process, releasing about 59.6 kJ/mol of energy. Great lecture otherwise!
Hi, nice video. What about the electron repellation? You only talk about the attraction from protons, but the electrons that are allready attached to the atom repells the incoming electron. How does that affect electronegativity and affinaty?
Explanation of Atomic Radius, Ionization Energy, Electronegativity was great , however, I didnt get most of the part you said in Electron Affinitity :(
mate this video is splendid. you summarized the whole 2hr lesson in almost 14 minutes. thats awesome you have really helped .. i hope you do more videos like this
Ya'll have this in college but we are having it in grade 8 chemistry these days and it's such a pain the butt and our teacher is so hard to get on the same page with... I wish I had this guy as my teacher! Awesome lecture thanks much
Don't worry, college is easier than high school. It is sooooo lame. You just take the same classes again...... Save your notes from High School. Don't burn them like a happy-go-lucky idiot.
Isn't it fair to say as we go from left to right on a table, our radius and reactivity decrease while our ionization energy and electronegativity increase? They're like a teeter totter. Two go up, the others go down. Just like if we go from top to bottom on a periodioc table, the radius and reactivity increase, but the ionization energy and electronegativity decrease? Force is electronegativity, no?
In the atomic radius part, If the radius of an atom decreases across the period due to the increase in protons along the period, why then does the radius increase down the group just because of an outer shell, wouldn't the increase in protons down a group make the increase based on outer shell insignificant?
If we want to understand that then let's compare Lithium and Sodium , between them Li has 2 orbitals and Na has 3, considering your question in mind lets assume Na has 2 orbitals (imagining), comparing it with Li it will be seen that Li has greater radius than Na as number of orbitals are same but Li has less electrons in its outer shell than Na. Now back to the reality Na has 3 orbital which has 1 electron in its outermost shell ,which means it has one more shell that of Li. From Coulombs law we can know force of protons are acting parallely on the number of orbitals the atom has and F (inversely propor.) to distace between (proton and electron in this case) . As Na has one more orbital than Li considering the law F inversely proportional to distance , we can conclude to that radius of Na is greater.
Nice lecture. Just wanna add a point to electronegativity. When we talk about electronegativity we are considering a bonded atom not a freely existing atom.
Everything's clear and understandable. You must be passionate about chemistry..u sound like u are . Really. :O And THIS is what really makes people understand thgs they couldnt understand from books... i think. :)
Thank u is not enough. I read my lectures, somehow, I did not understand nor was able to picture these trends. I really like the fact the you just get to the point without any fuzz! Keep them videos coming.
if u r the teacher then their is no requirement of books... and even no need to revise czz once u spoke something it has an unbelievable power to get in our mind permanently u rockk
hey !! Sir i have i doubt ... " From where these electrons are being taken ?" From where the Ca is obtaining electrons ? ( Can u plz explain ...as soon as possible)
thank you a million. you explained much more better than our books. i have a single question, In the ground state of 33As; how many electrons have L=1 quantum numbers. thanks very much.
My homework involves ordering electrons by atomic radius. How would you go about ordering several different elements such as Lithium, Magnesium, and Bromine? These share neither a period nor a column so it seems very difficult to order them. On one hand they increase from top to bottom, but they also decrease from left to right. Which one overrides the other and how do you know which order they are in?
The electron affinity of Lithium is the same sign as the electron affinity of Fluorine, but just a much smaller magnitude. Therefore, it is also exothermic.
Thanks a lot for a good explanation. I have an exam tomorrow and did not understand a single sentence from my textbook but I understood it after watching this awesome video. Thanks a lot!
if the number of electrons increases along the period therefore the number of orbits increases in which the electron revolves. then why does the atomic radius decreases?
this one video taught me more in 14 minutes than 2 hours of college chemistry
He is just great!
A great combination of being very simple and easy to understand (step by step, terms all explained very well), yet energized and quick which helps keep the video more interesting.
Jaron Talotta thanks for the positive feedback Jaron :)
Students like myself, if this lecture is helping you like it helped me, I would urge you to donate on this guy's page, you can use paypal and it is very easy, I just did it, we need to support work like these because chemistry is not easy, and these youtube private lessons are worth it!!! I paid a tutor $150 3 hours to get this and still could not get it!!! so do your part spread the word and donate to this dude's site for coffee!?! oh well here is the link: www.aklectures.com/contribute.php
That is very humbling to hear! I never thought that these lectures would bring so much clarity to so many people! Thank you very much for your contribution! Although I do need my caffeine to keep me going with these lectures, I can assure you that your contribution will extend to other, more serious matters (like upgrading the equipment to make more awesome lectures!) Thanks once again! - Andrey
You're a life saver. I don't think anyone could have explained it any better! :)
thank you for explaining it very well, I have a exam on our chemistry tomorrow and I'm confused about this topic great help dude :)
I have a final tomorrow and now I understand this completely! Thank you sooooo much!!!
thats wonderful to hear! good luck on it :)
Still relevant in 2019, helpful for understanding and great explanation
Considering that an atom is not a solid sphere, the atomic radius is an approximation. We talk of electrons orbiting the nucleus in terms of probability and so an electron can be found as far away as you'd like (given that the probability decreases as you go farther). Therefore, no, you cannot take a ruler and measure the radius. But you can approximate it.
Thank you for the kind words. If you go onto my main channel page, you should find my orgnanic chemistry playlist. I believe I have over a hundred videso on different topics in organic chemistry. I will be adding many more in the near future, so stay tuned!
Hey! On my channel page, click the playlist "Organic Chemistry" and find the lecture on "Ionic Bonds". There, I talk more about electron affinity and ionization energy. Let me know if you cannot find it, I will message you the link.
you are probably the greatest chemistry teacher out there thanks man keep making more videos
shebu dash thanks! i appreciate that :)
12:57 just want to point out a discrepancy - Lithium's first electron affinity is an exothermic (not endothermic) process, releasing about 59.6 kJ/mol of energy. Great lecture otherwise!
You explain this so well i always come back to this video when i need to review this stuff! Thanks a lot! Wish you were a prof at my school!
PRESSED AS SOON AS I SAW THE KEY WORDS I NEED TO STUDY
Hi, nice video. What about the electron repellation? You only talk about the attraction from protons, but the electrons that are allready attached to the atom repells the incoming electron. How does that affect electronegativity and affinaty?
u really xplained vvvv well sir.......thankuu so mch.......yr tutorial helped me a lot..............☆☆☆☆☆
fucking love this guy
Thank you very much. Great to hear that my videos are helping others understand the simplicity in nature :)
Yesss!! What a great video!! You are an amazing teacher! Thank You Thank Yoooou!
Explanation of Atomic Radius, Ionization Energy, Electronegativity was great , however, I didnt get most of the part you said in Electron Affinitity :(
I amnot satisfied about electronegativity, u have to deal about shared pair electron..
If the sodium atom has 3 energy levels shouldn't there be 3 shells drawn around it to represent the energy levels? (For lithium as well)
mate this video is splendid. you summarized the whole 2hr lesson in almost 14 minutes. thats awesome you have really helped .. i hope you do more videos like this
hah! Looks like you and the guy below have something in common! Glad to know it helped! :)
if i was in his class i would be scared to ask a question because he seems like he would go off. like fuka didn't i just explain this shit.
Thank you so much ! exam in 5 days !
Good luck!
more like, in 5 hours
1st online lecture i have ever understood... thank you so much.. please do another lectures in chemistry
DAMN IF MA CHEMISTRY LECTURER WAS LIKE AK LECTURER'S I WOULD ACE ALL MA TEST
Great to hear that! Will definitely continue making these videos! :)
thanks that really helped me a lot!! exam tomorrow!
bravo!thanks you helped me a lot
thank you very much! great to get comments like these! cheers!
Thank you so much, I wish you were my Chem teacher!
Lucy James lol thanks! :-)
nyc one hope u start making more videos on chemistry topics....
Ya'll have this in college but we are having it in grade 8 chemistry these days and it's such a pain the butt and our teacher is so hard to get on the same page with... I wish I had this guy as my teacher! Awesome lecture thanks much
Don't worry, college is easier than high school. It is sooooo lame. You just take the same classes again...... Save your notes from High School. Don't burn them like a happy-go-lucky idiot.
can you do a s block,p block ,d block and f block element
you look like deadpool's actor
you're a gift from heaven. thank you
Amazing lecture. I listened to my teacher for 50 minutes and was severely confused, but you helped me understood the concept under 15 minutes.
AK LECTURES Just wondering. Do you teach at a University??
+Hom Sikes No I dont
Isn't it fair to say as we go from left to right on a table, our radius and reactivity decrease while our ionization energy and electronegativity increase? They're like a teeter totter. Two go up, the others go down. Just like if we go from top to bottom on a periodioc table, the radius and reactivity increase, but the ionization energy and electronegativity decrease? Force is electronegativity, no?
Extremely helpful, thanks a lot.
Thanks Danielle!
you the best none of these lecture explain like you do thanks exam in 2day now am prepared
U R Awesome !!!
CreepyGreenHD Thanks! :)
you're welcome!
I really loved how simple and great this was. Hoping to see more uploads like these
Its AWESOME your tutorial !! yo have a facebook account, its because I have more questions ??
In the atomic radius part, If the radius of an atom decreases across the period due to the increase in protons along the period, why then does the radius increase down the group just because of an outer shell, wouldn't the increase in protons down a group make the increase based on outer shell insignificant?
If we want to understand that then let's compare Lithium and Sodium , between them Li has 2 orbitals and Na has 3, considering your question in mind lets assume Na has 2 orbitals (imagining), comparing it with Li it will be seen that Li has greater radius than Na as number of orbitals are same but Li has less electrons in its outer shell than Na. Now back to the reality Na has 3 orbital which has 1 electron in its outermost shell ,which means it has one more shell that of Li. From Coulombs law we can know force of protons are acting parallely on the number of orbitals the atom has and F (inversely propor.) to distace between (proton and electron in this case) . As Na has one more orbital than Li considering the law F inversely proportional to distance , we can conclude to that radius of Na is greater.
Thanks Abby
lol thanks!
:) thanks!
Welcome Mike
Thanks!
Did you just say from boron to so on? haha. Good job. Thanx.
lol thanks
i really got it now. it will help me alot for my exam on Thursday. thank you very much.
lol! glad to be of assistance :)
Thanks! And you're welcome :)
You're welcome, glad it did :)
Nice lecture. Just wanna add a point to electronegativity. When we talk about electronegativity we are considering a bonded atom not a freely existing atom.
Thanks! Happy to hear that.
So helpful! Thank you so much! Exam tomorrow :|
amazing keep it up
Thanks, I appreciate that.
your super duper lecturer
lol pretty good laugh :)
Loveeee your energy... Makes me focus. Thanks!
Awesome to hear! :)
swag
Hey.. awesome lecture AK... I understood it properly... Thanks A loT bro.. :) :)
Everything's clear and understandable. You must be passionate about chemistry..u sound like u are . Really. :O And THIS is what really makes people understand thgs they couldnt understand from books... i think. :)
Thank u is not enough. I read my lectures, somehow, I did not understand nor was able to picture these trends.
I really like the fact the you just get to the point without any fuzz! Keep them videos coming.
Very good work
if u r the teacher then their is no requirement of books...
and even no need to revise czz once u spoke something it has an unbelievable power to get in our mind permanently
u rockk
You're probably the most helpful guy on this topic. you've just earned yourself a subscriber.
Thank you! :-)
Nice video! How about negative electron affinity? Which has the most negative electron affinity F atom or F- ion? and why? thanks!
nice lecture
hey !! Sir i have i doubt ... " From where these electrons are being taken ?" From where the Ca is obtaining electrons ?
( Can u plz explain ...as soon as possible)
thank you a million. you explained much more better than our books. i have a single question, In the ground state of 33As; how many electrons have L=1 quantum numbers. thanks very much.
My homework involves ordering electrons by atomic radius. How would you go about ordering several different elements such as Lithium, Magnesium, and Bromine? These share neither a period nor a column so it seems very difficult to order them. On one hand they increase from top to bottom, but they also decrease from left to right. Which one overrides the other and how do you know which order they are in?
Thank you sir. Nice video. easy to understand.
Looking forward to watching more videos of this channel
The electron affinity of Lithium is the same sign as the electron affinity of Fluorine, but just a much smaller magnitude. Therefore, it is also exothermic.
Fantastic
Thanks a lot for a good explanation. I have an exam tomorrow and did not understand a single sentence from my textbook but I understood it after watching this awesome video.
Thanks a lot!
IT CLICKED
Omgg I didnt understand a crap my teacher taught in class lol but now I understand all this. Thanks so much for the lecture bro :)
I missed an entire lesson about ionization energy, electron negativity and affinity and I have a test tomorrow. Thank you! You saved me!
Omgg I didnt understand a crap my teacher taught in class lol but now I understand all this. Thanks so much for the lecture bro :)
LOL, by looking at the comments, it seems to be an excellent video :) Btw, I am commenting this before watching it :) Keep it up!
life would be so much easier if you were my lecture... thank you much! you explainations are so clear it scares me! u da King!
Omgg I didnt understand a crap my teacher taught in class lol but now I understand all this. Thanks so much for the lecture bro
Omgg I didnt understand a crap my teacher taught in class lol but now I understand all this. Thanks so much for the lecture bro
It was really very good...I could understand each and every trend properly...tysm :)
thanks man my chemistry teacher is being a shithead and testing us without teaching the material. now i get it, good shit
if the number of electrons increases along the period therefore the number of orbits increases in which the electron revolves. then why does the atomic radius decreases?
good job
Gr8 job andrey! 13 min of this vid was better than 2hrs of my reading :) I cant forget this even if i want to :)
awesome
is electron gain enthalpy the "maximum" or the "minimum" energy liberated by an atom?
If you're looking for a laugh, watch it with closed captioning. The stuff youtube thinks you say is hilarious!
you explains things very well! I watched a few videos before coming here and this was definitely the best one.