u are literally the best chem tutor on yt!! ur teaching style is great and soo easy to understand. i wish the future would have more teachers like you sir, thanks for all you do
You speak slower than my chem teacher and explain the concepts incredibly clearly, and simply even with the correct language. I learnt more in your 30 minute lesson and understood much more than I did in my school teachers 3 lessons. You are amazing!
That's lovely to know! Thanks for the feedback 😀 This is a link document to all my videos. I'm continually adding to it. docs.google.com/document/d/1JfmOcGMNEMJzmxOx5AEoQqD74lAHC2FS/edit?usp=drivesdk&ouid=108041655224173585816&rtpof=true&sd=true
Sir there are some questions that are asked in this topic like the oxidation number of some rxns I think , can u plzzz help me with that . Thank u , u r wonderful teacher ever🙂
Lovely to hear from you! I'm glad the videos are useful. Oxidation States tend to come in more in the redox topic, along with group 2 and group 7. I've done a video about redox: ruclips.net/video/bjtO_PEgd64/видео.html
@@chemistrytutor Just wondering, are there any other online tutors that you used personally or like? For maths, physics or chemistry. Thank you. Oh and the first dip caused in ionisation energy, is not only due to the higher energy level of the p subshell but also because it has additional shielding from the 3s² electrons
Greetings!! Thank you very much for helping students like me with such helpful videos! Also, I noticed that access to the document you have with all your videos is not given, kindly check the settings to ensure anyone with the link is able to open the document. Thanks for this video again!!
Hi, so sorry... this must have slipped through the net! I've updated the settings and it should work, please let me know if it doesn't! drive.google.com/file/d/1s3I5prjbJRR1U1lcKpXO9TQpQMaVoP66/view
@@justsomeone5660 well, I've already made some videos about these topics. They're exam question focused, so whilst I don't go through all the facts one at a time, they deliberately cover a lot of the content drive.google.com/file/d/1s3I5prjbJRR1U1lcKpXO9TQpQMaVoP66/view?usp=drivesdk
so electronegativity decreases down a group because there’s more energy levels -> causing a wider distance between outer electrons and nucleus -> therefore less pull from the nucleus. but if the effective nuclear charge stays the same down a group, how can the nucleus have less pull? is effective nuclear charge and the nuclear charge mentioned in the video different?
It's that nuclear charge (which does increase as you said) becomes less significant than the increase in distance down the group along with the extra shielding. The decrease in attraction caused by these two things is much more significant
You're correct, shielding can definitely affect those properties. However, when considering the pattern across a period (which is what periodicity looks at) the elements in a particular period all have the same shielding, so that wouldn't explain any changes you observe. If we'd been looking at a pattern down a group you would be correct to mention an increase in shielding
Great question. I think there is, slightly, but its masked by the s orbital being closer to the nucleus than p. So the repulsion is outweighed by being closer to the nucleus that has a higher nuclear charge
I'm really pleased it's useful 😀 It's not for any exam board in particular. It's inorganic Chemistry, so I think for CIE that starts at topic 9? Chemical Periodicity
26:24 So would you say the reason why P, S and Cl have slightly higher mps than argon is due to the covalent bonds being present which need energy to be broken aswell as vdw forces too, while argon only and only has vdw forces to break?
No, I'm afraid that's not it. When you melt something you don't break any Covalent bonds. Think about ice... its solid H2O, water is liquid H2O. All the bonds are still intact. It's due to the Molecules that you mentioned being larger than an argon atom there is additional surface area so the vdw forces between Molecules are stronger. Stronger (or more) vdw forces means that more energy needs to be put in to break them
You've asked a really simple sounding question that actually has a number of very complicated answers. You don't need to know if for a level but the explanation that ties in with something you do need is that its to do with shielding (some places call it screening) and electron-electron interactions. The deeper you go into electron orbitals the more our model gets refined by quantum mechanics. So if you want to go further, that's the direction to go.
@@chemistrytutor thanks, im gonna hold that thought bc I have an AS chem mock and a maths one tomorrow.(praying they dont lower my predicted grade from an A)
@huzaifakhan2798 thanks for your comment. Making the slides into a document isn't a quick job so I wanted to find out how useful it would be as to whether it was the best thing to prioritise 😀
Teachers like you are making the world a much better place for students like me.
That's so lovely to hear, thank you 😊
Lies again? Plane Ticket USD SGD
Facts
u are literally the best chem tutor on yt!! ur teaching style is great and soo easy to understand. i wish the future would have more teachers like you sir, thanks for all you do
Thank you for your kind words! It's really nice to know that it's useful for people! It helps to keep me going! 😃
You speak slower than my chem teacher and explain the concepts incredibly clearly, and simply even with the correct language. I learnt more in your 30 minute lesson and understood much more than I did in my school teachers 3 lessons. You are amazing!
That's very lovely to hear! Thanks for the feedback 😀
You are an absolute lifesaver kind sir.
Thank you for your kind words! 😀
You are such a life saver Sir ❤...i never understood this topic before but now am better 🙏 keep it up Sir
Thanks for the lovely feedback! Well done for sticking at it 👏
Your videos are so useful. I love the way you explain it.
I wish I had you as my chem teacher.
Thank you so much for these amazing videos.
That's very kind of you to say so. I'm really pleased they're useful 😀
This was really helpful! I just started my alevels … and really helped me to understand this lesson.
That's lovely to know! Thanks for the feedback 😀 This is a link document to all my videos. I'm continually adding to it. docs.google.com/document/d/1JfmOcGMNEMJzmxOx5AEoQqD74lAHC2FS/edit?usp=drivesdk&ouid=108041655224173585816&rtpof=true&sd=true
Sir there are some questions that are asked in this topic like the oxidation number of some rxns I think
, can u plzzz help me with that . Thank u , u r wonderful teacher ever🙂
Lovely to hear from you! I'm glad the videos are useful. Oxidation States tend to come in more in the redox topic, along with group 2 and group 7. I've done a video about redox:
ruclips.net/video/bjtO_PEgd64/видео.html
Thank you, I watched this entire video and could make sense of it all the way through. ❤
Excellent! Glad it was helpful!
@@chemistrytutor Just wondering, are there any other online tutors that you used personally or like? For maths, physics or chemistry. Thank you.
Oh and the first dip caused in ionisation energy, is not only due to the higher energy level of the p subshell but also because it has additional shielding from the 3s² electrons
So, so well explained! Thank you!!
Thank you for the lovely feedback!
Thank u so much, i understood everything so clearly!! Im pass my exam with flying colors!
Glad it helped!
Greetings!!
Thank you very much for helping students like me with such helpful videos! Also, I noticed that access to the document you have with all your videos is not given, kindly check the settings to ensure anyone with the link is able to open the document. Thanks for this video again!!
Hi, so sorry... this must have slipped through the net!
I've updated the settings and it should work, please let me know if it doesn't!
drive.google.com/file/d/1s3I5prjbJRR1U1lcKpXO9TQpQMaVoP66/view
Thank you very mucb sir we students very much appreciate your hard work :)
Thank you for your kind feedback! It's very nice to know it's useful 😊
@@chemistrytutor hi sir,is there any video specifically on the scales of electronegativity,like Pauling scale and all?? It would be really helpful!
@@Krishnaslover. here's a video about Polarity and electronegativity ruclips.net/video/81DFZQTDD2g/видео.html
Thank you so much for this video! I usually never comment, but this video is just so good. I finally understand this topic!
Thank you so much for the kind feedback 😊
I'm really glad it's useful
Thank you very much. God bless you sir
I appreciate your kind words 😊
Is this Alevel Syllabus chapter 9 complete? Love the way you explain👍
Thank you! Yep, whole topic 😀
soo helpful, thank you so much! can u please make videos on unit 2 of edexcel ial?
I'm less familiar with that course. Is that the unit that includes Transition Metals, Amino acids and Amines?
@@chemistrytutor yep, I'd really appreciate if you check the Edexcel IAL specification and make videos on those topics 🙏
@@justsomeone5660 well, I've already made some videos about these topics. They're exam question focused, so whilst I don't go through all the facts one at a time, they deliberately cover a lot of the content drive.google.com/file/d/1s3I5prjbJRR1U1lcKpXO9TQpQMaVoP66/view?usp=drivesdk
sir, have you also made a video on mass spectrometry?
Hi, yes I have... here you go ruclips.net/video/O7ccsHNhch4/видео.html
really useful video, thanks a ton!
Very welcome! Thanks for the feedback 😀
@@chemistrytutor do u have vids for all other chapters as well? do u have a video for reactions of period 3 with oxygen, water and chlorine?
so electronegativity decreases down a group because there’s more energy levels -> causing a wider distance between outer electrons and nucleus -> therefore less pull from the nucleus.
but if the effective nuclear charge stays the same down a group, how can the nucleus have less pull?
is effective nuclear charge and the nuclear charge mentioned in the video different?
It's that nuclear charge (which does increase as you said) becomes less significant than the increase in distance down the group along with the extra shielding. The decrease in attraction caused by these two things is much more significant
Thank you so much for these videos, they mean a lot:).
It's great to know they are useful 😀
why dont you talk about how shielding affects ionisation energy and and electronegativity? These are valid points aswell.
You're correct, shielding can definitely affect those properties. However, when considering the pattern across a period (which is what periodicity looks at) the elements in a particular period all have the same shielding, so that wouldn't explain any changes you observe. If we'd been looking at a pattern down a group you would be correct to mention an increase in shielding
thanks, why is there not a dip on Mg where 2 electrons are in 1 orbital in s subshell 15:53
Great question. I think there is, slightly, but its masked by the s orbital being closer to the nucleus than p. So the repulsion is outweighed by being closer to the nucleus that has a higher nuclear charge
@@chemistrytutor thanks!
@@avighnas2334 no probs 😃
really helpful, is this the CIE cambridge syllabus? if so does this come under chapter 2- electrons in atoms??
I'm really pleased it's useful 😀
It's not for any exam board in particular.
It's inorganic Chemistry, so I think for CIE that starts at topic 9? Chemical Periodicity
Are your videos also applicable to the Edexcel IAL board?
Yes definitely. The main differences between exam boards are exam structure and question type. The content is 95% or more identical
26:24 So would you say the reason why P, S and Cl have slightly higher mps than argon is due to the covalent bonds being present which need energy to be broken aswell as vdw forces too, while argon only and only has vdw forces to break?
No, I'm afraid that's not it. When you melt something you don't break any Covalent bonds. Think about ice... its solid H2O, water is liquid H2O. All the bonds are still intact.
It's due to the Molecules that you mentioned being larger than an argon atom there is additional surface area so the vdw forces between Molecules are stronger. Stronger (or more) vdw forces means that more energy needs to be put in to break them
Thank you sur
Very welcome 🙏
Thank you sir
Very welcome 😀
@ 14:04 why exactly do the p subshell have slighly higher energy?
You've asked a really simple sounding question that actually has a number of very complicated answers. You don't need to know if for a level but the explanation that ties in with something you do need is that its to do with shielding (some places call it screening) and electron-electron interactions.
The deeper you go into electron orbitals the more our model gets refined by quantum mechanics. So if you want to go further, that's the direction to go.
@@chemistrytutor thanks, im gonna hold that thought bc I have an AS chem mock and a maths one tomorrow.(praying they dont lower my predicted grade from an A)
@ravjayakodi2746 good luck 👍
Thx teacher you're the best
😃
sir thanks❤❤
Very welcome 😀 👍
Grt explanation!
Thank you! 😊
It's really nice to know it's useful 😊
Wow😭so this is A level in America
This is O level in Africa😭😭😭😭😭
😬 that's tough! Yes, this is what 16-17 year olds study in the UK
I love it
😃
Who is hear for Exams
👇
Good luck with the revision!
Where can we get these slides
It's a great question! Currently not available. Would they be useful?
No he thinks it'll be useless, thts why he's asking, duuuhhhh
@huzaifakhan2798 thanks for your comment. Making the slides into a document isn't a quick job so I wanted to find out how useful it would be as to whether it was the best thing to prioritise 😀
@@chemistrytutor Im sorry, i didnt realise. Mb
When American year 12 work is our year 10 work😭😭
😲
That seems unfair!
@@chemistrytutoryou probably don't need to know much of this for GCSEs if any of this stuff
Wow
😀👍
Very helpful! Cleared all my doubts❤️🩹
Excellent! I'm really pleased it was useful!
i'm rewatching for my finals and found this comment, lol. Still as useful.