Watching this video 9 years after its been uploaded and still the most useful resource I could have ever come across. Thank you Mr Rintoul, Still saving lives
"That's absolutely... dire" "[Do not do this...] It will be the END of you" A couple of quotes I had to laugh at Very helpful, comprehensible explanations in these videos, thank you
Yep! Also in UK lockdown and online learning, as college closes down further. Very happy I've found this chap. Makes such great sense. Thank you so much for the fantastic video! Subscribed and shall be watching many more! Looking for A-Level Physics and Maths also!
my teachers are great honestly. but you explain like how the MARK SCHEMES want. especially when you’re talking about MP and BP. the ‘therefore X therefore Y’ is so helpful when i’m writing my notes. your videos are really concise and the way you explain is, like i said, what the mark scheme wants :) i can’t thank you enough :)
Fantastic videos! Thank you so much!! 😁 Looking out for A-Level Physics and Maths also, whilst we have moved more heavily to online learning from college.
Thank you! My text book shows that Aluminium has a lower boiling point than Silicon :/. But apart from that, everything makes sense, and you've explained it very well. The notes I've jotted down will be very useful :) x
Very helpful video thank you. Question: if two molecules had the same number of atoms bonded, e.g. Cl2 and H2, would they have the same strength of intermolecular forces and if not how can you work out which is bigger? Basically, how do number of protons or electrons affect vdw forces?
But surely the attractive forces between the nucleus and outermost electrons don't increase across the period? Yes, okay, you're adding an extra proton which increases nuclear charge, but you're also adding on an extra electron. The two should cancel each other out? For every one proton that is added, the force is balanced out by the one electron added each time, or not?
yes youre, adding an extra electron. however, this is still within the same shell so the same distance between the nucleus and the proton. if proton number increases, the power of the attraction increases as well
Weird that I didn't see your comment but literally just organised them that way! I would like to have them done, but it all depends on time! If you had to put the missing topics in order, what would you want done first?
E Rintoul Id have to watch through all your videos to see whats missing. Having said that I think Im quite comfortable with everything other than some parts of organic. Ill try and find which parts of that are missing
E Rintoul Just had a quick glance at the syllabus. Would a video on refining crude oil, cracking, pollutants (from combustion) and catalytic converters be possible?
rgqwerty63 That's one I was thinking of. I reckon I could get all of that into one video. Just working on an Ionisation Energy one that I hope will be up later on.
Why would there be no "dip" between Na and Mg, it goes from 3s1 to 3s2, would there be no pair repulsion or would it be too weak to cause a "dip" in the graph?
+BGGovedoto im only an as student myself by my take on it would be that in the s sub shells the electrons dont pair together, there are only 2 electrons in the s shell and they have all of this space to be as far apart from each other as they like, so thats exacly what they do.
I always get confused on why melting and boiling points rely on bonding, I thought it was to do with intermolecular forces rather than intra. Please could you help?
Eve Rosser That's a fair point! It really depends on the context... When we're talking about compounds e.g. water, then we are talking about the intermolecular forces. These are the forces that are holding the water molecules together and so when we overcome these, we change the state. If we're talking about a lump of iron, or maybe a piece of diamond, we have no intermolecular forces and so in those cases we look at the forces that hold the atoms and ions in place. In general terms, the only time you will use the term intermolecular force is when talking about a simple covalent structure e.g. water, methane, carbon dioxide etc. Does that help at all?
skwli Ermmm. I think Unit 1 is pretty much covered. Not done a video solely on Bonding, but I think that's the only one missing. From Unit 2, there's nothing on alkenes as of yet. Think that might be about all that's missing...?
Can you please explain me that the reason behind the melting point from p4 to cl2 is due to vanderwalls or covalent bond . I am extremely confused. You wrote that they have their m.p and b.p due to covalent but in explaination you are saying its vanderwall.
Water Melon I would say it is a combination of that, along with the fact that the 3p1 electron is that bit further away from the nucleus. Does that make sense?
How large does the difference in electronegativity have to be between two atoms to become dipole-dipole attraction rather than vdw? Btw great videos, they really help!
Louis Shropshire In the exam you aren't given values of electronegativity, so don't worry. As a general rule, if you have a halogen involved with a carbon or hydrogen, it will be permanent dipole!
+Shilpi Rani Mazumder I may do at some point... You aren't expected to know the values on the Pauling's scale. However, you can work out what elements would be most electronegative (small, low shielding and highly charged nucleus). Hydrogen and carbon bonded to halogens tend to polar bonds, but there's not much else to it! Is there something in particular that you are struggling with?
Shilpi Rani Mazumder Generally speaking, the RHS of the periodic table is more electronegative and the LHS is less electronegative. The key really is to look for bonds where halogens are present as these tend to have a high electronegativity e.g. C-Cl bond. That links in nicely to your permanent dipoles in IMF and a bit into H-bonding. That helped at all?
Hello... Sorry to bother you.... Can you please help me understand which compounds will have intestaneous dipole and which compounds will be dipoles? Please reply when you have time... Take care...
+Pradeep Dc Hi, Pradeep. I honestly don't have the time - doing these videos takes a huge amount of time as it is. Maybe one day this will be my full-time profession, but right now I can't spread myself that thinly. I'm sorry. BUT, you will find a lot of cross-over between the AQA and CIE specifications!
i'mm not sure if you have done a lesson on V.D.W forces and dipole-dipole, if not please may you do so? Thank you for these videos they are very helpful, and i highly recommended them to all my class mates
+zakariya mohamed The ionization energy is increasing across the period because more electrons are being added to the SAME shell. So the distance from the nucleus is not changing but the nucleus is getting more positive due to more protons so there is greater attraction and the I.E increases . ^.^ that's all you need to know
Abz Abzy Errr. That's the shortest question anyone has ever asked. If you mean period 4, I'm going to guess what your question is. I'm assuming you are asking if these trends also exist in period 4? If so, yes.
![[UNCUT]"ทนายตั้ม" แฉยับ! ความลับสวรรค์ ใครคือ "บิ๊กเทวดา" ของบอสพอล l คนดังนั่งเคลียร์ l 15 ต.ค. 67](http://i.ytimg.com/vi/ru9fpSaUwdA/mqdefault.jpg)
Watching this video 9 years after its been uploaded and still the most useful resource I could have ever come across. Thank you Mr Rintoul, Still saving lives
"just single argons ... all lonely" - relatable
brooo hahahhahaha
"That's absolutely... dire"
"[Do not do this...] It will be the END of you"
A couple of quotes I had to laugh at
Very helpful, comprehensible explanations in these videos, thank you
+L Stanley Wonderful :) I'm glad it helped!
Thank you so much for the video - anyone else having to watch this as part of homeschooling in UK COVID lockdown ?
yesss! these are honestly a lifesaver for my revision and learning from home
Zimbabwe
Yep! Also in UK lockdown and online learning, as college closes down further.
Very happy I've found this chap. Makes such great sense. Thank you so much for the fantastic video!
Subscribed and shall be watching many more!
Looking for A-Level Physics and Maths also!
@@zivaimudhara2565 Zimbabwe
@@cataclysmicimplosion8894 examsolutions.net is probably the best out there for maths.
my teachers are great honestly. but you explain like how the MARK SCHEMES want. especially when you’re talking about MP and BP. the ‘therefore X therefore Y’ is so helpful when i’m writing my notes. your videos are really concise and the way you explain is, like i said, what the mark scheme wants :) i can’t thank you enough :)
Really helpful, thank you for saving my exam :)
TheOtherOne71 Haha I'm sure you would have been fine! But thank you for the kind words.
Thank you finally found someone explaining British curriculum, Im taking cie and this is helpful, thanks!
This guy sounds really hot .. idk man
lol
Not just me then
He doesss
😐
@@d4rthd4v3 okay david
I had a test on Friday and I started watching this the night before, really saved my life man, thanks a lot!
Thank you so much, but I fell asleep. Such a soothing voice lol
Thank you for making this video! I've finally gotten my head around why IE can change with various elements in period 3!
subscribed! best chemistry help video everrrrrrrrrr!
So simple and organised, defiantly going to help me with my test on Periodicity tomorrow. Thank you
+Samba Katanda Fingers crossed! And thank you for the kind comments!
you haven't covered the reactions with oxygen, water and chlorine and the chlorides reaction with water and oxides reaction with water too
Fantastic videos! Thank you so much!! 😁 Looking out for A-Level Physics and Maths also, whilst we have moved more heavily to online learning from college.
Brilliant video!
Thank you! My text book shows that Aluminium has a lower boiling point than Silicon :/. But apart from that, everything makes sense, and you've explained it very well. The notes I've jotted down will be very useful :) x
Boro Jen xX Do you mean melting point...? I'm glad it's helped!
E Rintoul Both the melting and boiling points. The book I'm using is the AQA CGP Complete course guide for AS chemistry
Boro Jen xX I managed to confuse myself - it should be lower!
OMG how have I only found this angle from HEAVEN now!!! Definitely will be recommending this to everyone. Thank youuuu!!!!
+Aiswani Suresh he is surely an 'angle'
+Mesba Rahman I'm not even gonna lie and blame it on autocorrect I'm just a shitty speller when I get excited😂😂
+Aiswani Suresh haha. You doing the alevels this year?
+Mesba Rahman yhhh the AS exam on physical and inorganic is next friday😭😭 it's all very stressful
+Aiswani Suresh yh me too. You doing it in the UK?
Very helpful, very well organised videos and covers all the topic
Please can you make a video on period 3 and it’s oxides!
Aluminum has a smaller atomic radius than Magnesium so how can the electron in the 3p orbital be further away from the nucleus? Please answer
Very helpful video thank you. Question: if two molecules had the same number of atoms bonded, e.g. Cl2 and H2, would they have the same strength of intermolecular forces and if not how can you work out which is bigger? Basically, how do number of protons or electrons affect vdw forces?
Damn thanks
Exam tomorrow and u really helped me
But surely the attractive forces between the nucleus and outermost electrons don't increase across the period? Yes, okay, you're adding an extra proton which increases nuclear charge, but you're also adding on an extra electron. The two should cancel each other out? For every one proton that is added, the force is balanced out by the one electron added each time, or not?
yes youre, adding an extra electron. however, this is still within the same shell so the same distance between the nucleus and the proton. if proton number increases, the power of the attraction increases as well
great videos. will you be done unit 1 by Thursday?
Also if you can, could you organise your AQA AS videos into 2 different playlists for unit 1 and 2?
Weird that I didn't see your comment but literally just organised them that way! I would like to have them done, but it all depends on time! If you had to put the missing topics in order, what would you want done first?
E Rintoul Id have to watch through all your videos to see whats missing. Having said that I think Im quite comfortable with everything other than some parts of organic.
Ill try and find which parts of that are missing
E Rintoul Just had a quick glance at the syllabus. Would a video on refining crude oil, cracking, pollutants (from combustion) and catalytic converters be possible?
rgqwerty63 That's one I was thinking of. I reckon I could get all of that into one video. Just working on an Ionisation Energy one that I hope will be up later on.
E Rintoul ok thanks in advance :)
Why would there be no "dip" between Na and Mg, it goes from 3s1 to 3s2, would there be no pair repulsion or would it be too weak to cause a "dip" in the graph?
+BGGovedoto im only an as student myself by my take on it would be that in the s sub shells the electrons dont pair together, there are only 2 electrons in the s shell and they have all of this space to be as far apart from each other as they like, so thats exacly what they do.
I am guessing it is because the nuclear charge is increasing due to the addition of the extra proton, which overcomes the repulsion
I always get confused on why melting and boiling points rely on bonding, I thought it was to do with intermolecular forces rather than intra. Please could you help?
Eve Rosser That's a fair point! It really depends on the context...
When we're talking about compounds e.g. water, then we are talking about the intermolecular forces. These are the forces that are holding the water molecules together and so when we overcome these, we change the state.
If we're talking about a lump of iron, or maybe a piece of diamond, we have no intermolecular forces and so in those cases we look at the forces that hold the atoms and ions in place.
In general terms, the only time you will use the term intermolecular force is when talking about a simple covalent structure e.g. water, methane, carbon dioxide etc.
Does that help at all?
E Rintoul yeah that's great! cleared it up massively, cheers.
Sick video, clear and organised.
Agreed
Hello Sir, I'm just wondering, for your unit 1 and 2 videos so far, which topics are still missing? I wanna know so I can go over them in my CGP book
skwli Ermmm. I think Unit 1 is pretty much covered. Not done a video solely on Bonding, but I think that's the only one missing. From Unit 2, there's nothing on alkenes as of yet. Think that might be about all that's missing...?
E Rintoul Thanks!
Can you please explain me that the reason behind the melting point from p4 to cl2 is due to vanderwalls or covalent bond . I am extremely confused. You wrote that they have their m.p and b.p due to covalent but in explaination you are saying its vanderwall.
Hi sir, do your Chem videos cover the syllabuses of IAL Edexcel board, too? Or is it just for AQA? My school's under Edexcel board.
May God bless you with all his blessings.
Amen
Thanks so much :D I Can't count on my teacher to explain it as good as you did
+Armchair General No problem :)
For melting point and boiling point is it the inter or intramolecular forces that need breaking?
How come period 3 has the same shielding but the reason for the decrease in ionisation from Mg to Al is more shielding from the 3s2 orbital??
Water Melon I would say it is a combination of that, along with the fact that the 3p1 electron is that bit further away from the nucleus. Does that make sense?
does the trend in m.p and b.p apply to all periods?
Great way of explaining..keep it up
PLEASE DO BONDING & INTER-MOLECULAR FORCES
xxpinkladiesxx OK IT IS ON MY LIST TO DO I WILL TRY AND DO IT SOON
E Rintoul You're the best! Sorry for yelling!!
xxpinkladiesxx I accept your apology. Plus, there is now a video for Intermolecular Forces!
E Rintoul you beautiful human, you.
My exam board is OCR, is it still okay for me to revise using these videos although they are aqa?
yes you can (even tho my response is useless)
PLEASE DO BONDING! It's so big, and you've gotten so many requests! I beg you!!
***** It's honestly on the cards!!!
I find these videos extremely helpful, do you do A2 new spec videos as well?
does this content the same as in the cie? because im taking cie chemistry
8:07 IONISATION ENERGY
there's one error. around 14:32, you wrongly drew the elements electronic configuration(you swapped each other's e.c)
What about oxides and chlorides of period 3?
you are a lifesaver
hello sorry i had a question i was really struggling with would I be able to email u it
What about the trend in electrical conductivity?..
Please make videos on aqa biology new spec!!!!
anjy panjy please boss please
How large does the difference in electronegativity have to be between two atoms to become dipole-dipole attraction rather than vdw?
Btw great videos, they really help!
Louis Shropshire In the exam you aren't given values of electronegativity, so don't worry. As a general rule, if you have a halogen involved with a carbon or hydrogen, it will be permanent dipole!
Okay thank you, keep up with the videos, they really help!
This video is beyond amazing keep going and brush ur teeth!!🦷
I didnot find viedio about Boltzman Distribution plz
thanks for these great videos!! i recommend them to all my friends
+Sam K Ah that's excellent! Thank you!
+E Rintoul no problem!! do you have an AS bio channel? that would be amazing
Sam K Not at this point. It's something that I think I may branch into... but not for a while yet!
Absolutely adore your videos!!! Will you be doing some on polymers and DNA etc ?!
Why is there no video on period three oxides (a level)? But this was a very useful video thank you
could u please mind making a video on electro negativity and tell me an alternative way of identifying the polar bond without the Pauling's scale?
+Shilpi Rani Mazumder I may do at some point... You aren't expected to know the values on the Pauling's scale. However, you can work out what elements would be most electronegative (small, low shielding and highly charged nucleus). Hydrogen and carbon bonded to halogens tend to polar bonds, but there's not much else to it! Is there something in particular that you are struggling with?
Yes... I am struggling with knowing which bonds are polar even if I don't know the electronegativity of the elements...
Shilpi Rani Mazumder Generally speaking, the RHS of the periodic table is more electronegative and the LHS is less electronegative.
The key really is to look for bonds where halogens are present as these tend to have a high electronegativity e.g. C-Cl bond. That links in nicely to your permanent dipoles in IMF and a bit into H-bonding.
That helped at all?
Hello... Sorry to bother you.... Can you please help me understand which compounds will have intestaneous dipole and which compounds will be dipoles? Please reply when you have time... Take care...
You are amazing
+Salima Naj Cheers, Salima. Strong words.
well explained, better than my chem teacher to be honest
have you done a video on Polarity?
henchhitmens Nope. Really, it's such a small portion of the bonding topic that I'm not in a rush to get it done! Can I help with anything?
Ahhh you are such a godsent blessing!!!! thank you, love you!
will u please upload vedios releted to CIE specification?
+Pradeep Dc Hi, Pradeep. I honestly don't have the time - doing these videos takes a huge amount of time as it is. Maybe one day this will be my full-time profession, but right now I can't spread myself that thinly. I'm sorry. BUT, you will find a lot of cross-over between the AQA and CIE specifications!
ok
can you do a video on the year 2 periodicity topic
Very helpful! Thank you!
Thank you so much sir
i'mm not sure if you have done a lesson on V.D.W forces and dipole-dipole, if not please may you do so?
Thank you for these videos they are very helpful, and i highly recommended them to all my class mates
Ninan Thomas Literally got it done this morning! You can find it here: th-cam.com/video/6EePsoVMO_4/w-d-xo.html.
Can I get an A in chemistry by just watching and learning from your videos, along with doing past papers aswell
that's what I want to know did you get an A? give some tips if u did
Someone answer this
could you add successive ionization energies to the video as I feel it's a bit important, other than that, very well organised and informative video!
+zakariya mohamed The ionization energy is increasing across the period because more electrons are being added to the SAME shell. So the distance from the nucleus is not changing but the nucleus is getting more positive due to more protons so there is greater attraction and the I.E increases . ^.^ that's all you need to know
+zakariya mohamed You want to have a look at my Ionisation Energy video. Here: th-cam.com/video/PNZV862SN6Q/w-d-xo.html
CIE and AQA are quite same ;)
OMG THANK YOU! this helped a lot
could you please do bonding
Richmond Osei At some point, yep! Intermolecular forces are next!
E Rintoul when are you uploading this? your videos are amazing and i have a mock coming up in 3 weeks. thanks
Thanks man this is great help!
BUT WHY DOES SILICON HAVE A LOWER BOILING POINT THAN ALLUMINIUM???????!!!!!!!!!!!!!!!
you are a life saver
why is sulfur S8 and not S2
The Two Dices it's a giant covalent structure
best so far
Please do a video on bonding
Aaliyah Ahmed Watch this space, Aaliyah...
E Rintoul will do and thanks
I Like it
Great video!
Thanks very much!
Great vid thanks
thanks dad
fluorine is the smallest atom not neon
Fab as ever
Thanks!
P 4?
Abz Abzy Errr. That's the shortest question anyone has ever asked. If you mean period 4, I'm going to guess what your question is.
I'm assuming you are asking if these trends also exist in period 4? If so, yes.
+E Rintoul he meant paper 4 that is A-2 Chem
maybe he asking for Inorganic videos for a-2 syllabus
Isnt period 3 A2 content
no
depends which exam board you're studying 🙂
good video, Thankyou! :)
Thanks
i miss you
❤❤
Oct/Nov zindabad
whos here tryna start a levels early cause of corona free time
El átomo de CARBONO
th-cam.com/video/ZMaxL-qzmU8/w-d-xo.html