If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom
Thank you so so much for this video. It really helped out on my chemistry IGCSE and guess what.. I passed!! 🎉🥳 This video is much appreciated, thank you, Cognito!❤
Bro u guys explain better than my teacher my teacher actually took 3 years 5lessons a week explain about : period tables,atoms bonding and all other things but I only know what she mean now cuz of you THANKSSS ALOTTT!!
I would like to tell you how grateful I am to you and this channel!! I have tons to learn and am running out of time, watching your videos gives me much more time to actually understand rather than memorize. You're voice is so calming, and ngl, I don't even realize I'm studying. I remember everything from your videos, because they are so well explained. I'm only 12 but I want to let you know that you basically have become my teacher. I've subbed and will always support.❤️ Saranghae💜 & Thank You🙏
Just wanted to let you know, on your website the question for wether or not Noble Gases are flammable or not has yes as the correct answer when in the video you say the opposite. Hope this helps :)
Thank you for making this channel which is so essential for everyone. I appreciate for your hardworking and taking time for producing these vital lessons. We are so proud of you. May god bless you.
Ya know what? This is just amazing! Next year I have my GCSE'S so I wanna prepare even more! And this is 100% useful! I absolutely love this and I'm taking notes from every video in case I forget or I just am not able to revise through my phone! Again thank you so much for this! Honestly you deserve more and I wish I could I give you something! I will get the grades I want for the payment of these videos!😁 PJ and of course I subscribed and liked this video!
@@loneyyou9922 ye I did 2 exams so far Bio and English literature. Bio wasn't that bad and English was absolutely amazing I even started to smile after the exam so that's a good sign. Chemistry is on Friday and got 3 exams to go after that!
This chemistry exams is gonna be pretty tough for me as its higher level. Cognito has again has helped. Pray i pass with good marks so I stay in set 1. Thanks for the video.
I really expect the whole syllabus for Cambridge IGSCE. But I couldn't find, anyway, finally, I found Cognito which give lessons very clearly, neatly, and educated. I think the way you show is the best from others. the drawings are very clear. Also, I use to do the papers from your sights, after watching your videos, I could do all the questions correctly except a few. Finally, I think I have got a kind of development of my school works better than my previous works. anyway, thnx a lot and a lot.
Could anyone explain to me how the boiling/melting point of halogens increases? I have been trying to understand for hours and I think there's maybe a block in my brain, I really don't understand.
is it becuase, due to shielding, and the shells increasing as you go down, the nucleus finds it hard to gain an electron, and making the outermost shell weaker for each element?
asian rat - essentially yes! Halogens are always looking to gain an electron to complete their outer shell. So, as you say, they’re trying hard to pull electrons off of nearby atoms. As you go down the group, the element has more shells, and so, as you said, the halogen’s nucleus can’t exert such a strong pull on the electrons of nearby atoms, because those electrons are always further away (because all the halogen’s shells are getting in the way). I hope this confirms what you’ve already said! :)
In group 1, the atoms that have more shells are more reactive because it is easy for the atom to get rid of it’s outer shell But in group 7, the atoms that have more shells are less reactive because they are further away from their main mass at the nucleus, making it harder to attract that last electron, and make a full shell. Still useful after 2 months?
Chemistry is by and large a bit of a labour... make sure you do some exercise in between revision, or you're brain will turn to jelly, and no one wants that.
If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are:
- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.
Amadeus & Tom
your video was actually helpful
very HelpfulTHANKS A LOT!!!you're my exam saver lol
🤓
amadeus is a fire name
I really love how you explain clearly and with the helpful diagrams! Thank you
Thanks for taking the time to say so Asi - it really helps us out :)
Same it really explains the hardest things so clearly
This video was fantastic. I am running short of time for studying and this video really helped speed up the process.
Hi Ramlah, thanks for leaving us a comment and really lovely to hear you found it useful :)
this a random comment you made 3 years ago :)
@@Arifasal So true but what can you say
@@izyansyed2817damn
Their videos makes my life a million times easier i have my chemistry GCSE tomorrow this helped loads 😭
same, good luck bro
Bro same wish you the best of luck
good luck!!
@@amirahilleen7439 how did it go
@@aadimaini8727 how did it go
Thank you so so much for this video. It really helped out on my chemistry IGCSE and guess what.. I passed!! 🎉🥳
This video is much appreciated, thank you, Cognito!❤
I really love how u explain with the pictures and drawings thank you very much.
Bro u guys explain better than my teacher my teacher actually took 3 years 5lessons a week explain about : period tables,atoms bonding and all other things but I only know what she mean now cuz of you THANKSSS ALOTTT!!
After watching the videos and reading the comments, I always smile and feel like the world is a better place 😊
your comment made me smile
Stuck in self isolation doing some chemistry and these videos are really encouraging me to keep studying
Lol me 2
I would like to tell you how grateful I am to you and this channel!! I have tons to learn and am running out of time, watching your videos gives me much more time to actually understand rather than memorize. You're voice is so calming, and ngl, I don't even realize I'm studying. I remember everything from your videos, because they are so well explained. I'm only 12 but I want to let you know that you basically have become my teacher. I've subbed and will always support.❤️
Saranghae💜
&
Thank You🙏
Really gonna be getting me through my exams, thank you so much
Thank you Cognito, your chemistry videos make it easy to understand chemistry
Your explanation is clear as day.
Thank you so much for making this video- it was really helpful and definitely taught me a lot!
Hi Yash, really great to hear that - cheers! :)
It is fontastics l love lt
Just wanted to let you know, on your website the question for wether or not Noble Gases are flammable or not has yes as the correct answer when in the video you say the opposite. Hope this helps :)
Really well explained. Better than my own teacher, thank you so much!
I will be subbing.
Thanks Kai! We really appreciate the support!
Thank you❤❤
This is the most easiest video on UA-cam❤❤
I just loved it❤❤❤❤
Thank you for making this channel which is so essential for everyone. I appreciate for your hardworking and taking time for producing these vital lessons. We are so proud of you. May god bless you.
Thanks Spectrum Studios, it's lovely to read comments like this 😊
thank you so much, you are explainig this so clearly and easily and your website is the best one for revisions, love that alot
U rlly have grown the last time I saw ur vids u were at 7k subs. Btw ur videos are really helpful ty
Ya know what? This is just amazing! Next year I have my GCSE'S so I wanna prepare even more! And this is 100% useful! I absolutely love this and I'm taking notes from every video in case I forget or I just am not able to revise through my phone! Again thank you so much for this! Honestly you deserve more and I wish I could I give you something! I will get the grades I want for the payment of these videos!😁 PJ and of course I subscribed and liked this video!
Thanks Iristuber 🤩 that's a great attitude! Good luck with your exams next year 🤞😊
good luck next week g
Good luck is it done?
@@loneyyou9922 ye I did 2 exams so far Bio and English literature. Bio wasn't that bad and English was absolutely amazing I even started to smile after the exam so that's a good sign. Chemistry is on Friday and got 3 exams to go after that!
@@iristuber2907 hope you get good Marks. Am still in Grade 8 i have 2 year for igcse
This chemistry exams is gonna be pretty tough for me as its higher level. Cognito has again has helped. Pray i pass with good marks so I stay in set 1. Thanks for the video.
Very useful! I hope I do well in my chemistry test :)
We hope so too 🤞
how did you do?
I really expect the whole syllabus for Cambridge IGSCE. But I couldn't find, anyway, finally, I found Cognito which give lessons very clearly, neatly, and educated. I think the way you show is the best from others. the drawings are very clear. Also, I use to do the papers from your sights, after watching your videos, I could do all the questions correctly except a few. Finally, I think I have got a kind of development of my school works better than my previous works. anyway, thnx a lot and a lot.
That's great Dharmasena, so glad to hear the videos and site have been helping! 🤩
every time this tops every other science video, amazing job.
thank you so much man you are a reel hero some people get high scores on there exam because you make these videos keep going
I understand this dude better in 5 mins than I ever did to my tr in year
i am an gcse student and this so helpful..... thank you so much
Don't we just love online school
🤟🤟🤟
Well no and sometimes yes
@@shivankkabu2938if u don't love online then go and get fucked by bulls
No
@@abdullahbinmustafiz5737why not?
cramming for my GCSE's🙏🙏, your videos help me so much, thank you :)
sameeeeee
@@qkhan418 goodluck bro you've got this!!
I’ve been set a ton of these videos for a exam
i in England in year 9
thanks for the vids, really love the animations :D
Ah thanks Harson, glad you like them 👍
Incredible, fascinating, superb
Just commenting to help with the youtube algorithm...
was just about to skip this video since it wasn't a level , but you have given me my answer !!
thanks brother, appreciate it a lot !!
you're welcome mate, glad we could help
I sooo needed that for my upcoming quiz thank you so much sir! ❤
literally so underrated
thank you so much ! you explain in a way that in such concise wording its perfect.
Great vid much better than my actual teacher
Is it possible that you can clarify about the colours of the halogens in solid liquid and gas forms?
Thx alot! Saved me for my mid-term
So nice and you explained very well
Thanks for helping me for my final exams
It's our pleasure 😊
Really good explanation.
I'm years away from this but owell
Nothing like starting 10 years too early amirite?
A sense a great scientist in the making
Really helpful, thanks!
Could anyone explain to me how the boiling/melting point of halogens increases? I have been trying to understand for hours and I think there's maybe a block in my brain, I really don't understand.
Because when you go down the group the intermolecular forces of attraction become stronger and therefore require more energy to overcome.
He is way better than my chemistry teacher
In exams, should we write chlorine displaces bromine or bromide? This is where I'm confused.
Same here
Chlorine displaces bromine because it is higher up on the reactivity series and there for taking it's place
WOW your videos are really good :)
Hey Zain thank you for the support and comment mate - really appreciate you taking the time as it boosts the videos up the rankings 🥂
So what does 1 part Floradine 3 parts Clorine, and 1 part Krpton do?
I can honestly tell you I've got no idea...
@@Cognitoedu would it help make A I Kick ass Laser, System, Guidence, Or actuall like Lazer gun stuff?
probably one of the hardest lessons ive taken
love your video thanks for the help!
You're so welcome - thanks for taking the time to let us know!!
I'm self studying gcse chemistry. Can I depend on the video ( the chemistry playlist) to sit for the exam next year
thanks man rlly helped me out
Are displacement reactions always only between halogens?
No they can be between other things too, like if a more reactive metal displaces a less reactive one :)
this video is better than the book . good
Thankies pitt! Again 🥳🥳🥳
I was working so hard for doing Group 7 Halogens.
Very clear and helpful explanation with diagrams
i dont understand as to why the reactivity decreases as you go down
is it becuase, due to shielding, and the shells increasing as you go down, the nucleus finds it hard to gain an electron, and making the outermost shell weaker for each element?
asian rat - essentially yes! Halogens are always looking to gain an electron to complete their outer shell. So, as you say, they’re trying hard to pull electrons off of nearby atoms. As you go down the group, the element has more shells, and so, as you said, the halogen’s nucleus can’t exert such a strong pull on the electrons of nearby atoms, because those electrons are always further away (because all the halogen’s shells are getting in the way). I hope this confirms what you’ve already said! :)
@@Cognitoedu thank you!!
Give example on : covalent bond between metal group and halogen .... what is Answer please ??
love the video mane. Thank you
for noble gases is it only for boiling or also melting pionts
also melting poins
it is a lovely way to teavh thanks cognito
Is it usable for syllabus 2023 - 2025
this guy is saving me man wrd
0:50 Guys, ignore this part, I listened to him and it came up on my exam yesterday 😭
What was the question about?
Could u just explain the covalent bond again but with fluorine in text?
Tysm for this I needed it a lot
Hey, could you cover the Kognity topics?
Why are halogens sat formers?
nice
that the way of teaching
Another helpful video
"If you can't explain it simply, you don't understand it well enough" - Albert Einstein
Nice video
Thanks!
😃
How do you relate this to other groups?
Wait, flourine is poisonous, don't we have that in toothpaste????
Year 9 northgate?
Very helpful information. Thanks! (:
hi i still dont understand the difference of reactivation in group 1 and 7. can you explain further?
what do you mean by reactivation?
In group 1, the atoms that have more shells are more reactive because it is easy for the atom to get rid of it’s outer shell
But in group 7, the atoms that have more shells are less reactive because they are further away from their main mass at the nucleus, making it harder to attract that last electron, and make a full shell.
Still useful after 2 months?
Thanks i needed this
What does the (g) and (aq) mean in 3:41
The state of the elect g is gas aq is aqueous so dissolved jn water and s would be solid
so helpful! thank you!
0:44
Iodine be like: Heh. Nohnohnoh! Me goood...
he says please share it with your friends me : I don't have any
very good video!
This helped me a lot
Noble gases where?
Who else is here having their gcse ezams😢❤
my head hurts man
Chemistry is by and large a bit of a labour... make sure you do some exercise in between revision, or you're brain will turn to jelly, and no one wants that.
@@Cognitoedu i want my brain to turn into jelly
@@jaivasandani6150 LOL
thank you sir
i just wish this guy was our school teacher
hey miss hoyle's class
Thank u ♥
Where is video for group 2,4😭
Who is cramming as much as these for the chemistry test
I aint cramming but i sure am studying
Halogens are diatomic by themselves, and noble gases are always totally solo!
Can u teach me online on zoom ...cash course....plz reply me ASAP
My teacher told me to think of displacement reactions as love and now I know why 💀💀
Thanks