GCSE Chemistry - Group 1 Alkali Metals #11

Рет қаралды 534,646

Күн бұрын

What are alkali metals? Why are they so reactive? What are the trends as you go down the group? How do they react with water, oxygen and chlorine? Learn all this and more!

Пікірлер: 270

@Cognitoedu 2 жыл бұрын

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 built specifically to make learning and revision as quick and 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 at a glance 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 huge bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

@lyndsayquinn8415 Жыл бұрын

I use these videos a lot and always direct my students to them but there is a mistake in the video. Chlorine gas has the formula Cl2. They often ask this type of equation in the exam and it is really important to highlight that they are diatomic and need to write the correct formula. Thanks

@not_today_x 5 ай бұрын

Who else got 2024 Chem coming up??? Edit- Paper 1 was acc decent! Best of luck for paper 2 x

@RoBotOnd 3 ай бұрын

Checkpoint exams 😮‍💨

@Im.Karla.08 2 ай бұрын

Me😭

@RoBotOnd 2 ай бұрын

@@Im.Karla.08 I wrote it yesterday 😭 I'm cooked

@Kariya99 2 ай бұрын

Tomorrow

@_c.rxty_7614 2 ай бұрын

P4 went well P6 soon

@ellamcadam9105 3 жыл бұрын

Thank you so much. I’m currently in year 11 with 8 months left until GCSEs, I’ve never understood chemistry and just decided I would fail the GCSE but over the past few days I’ve worked my way through 9 of your videos and I actually understand what I’d never understood in class. Just another 68 videos to go haha.

@Kate-hp9ei 3 жыл бұрын

Good luck w the GCSE’s mate 🙏🏻🤞

@kode9716 2 жыл бұрын

Bro what💀 im in year 8 and im taking the trends in group 1

@nashpoti2191 2 жыл бұрын

@@kode9716 I am in class 7 and have to study it :( From Bangladesh 🇧🇩

@AAAAAHHHHHHHASAAA 2 жыл бұрын

IM DOING THAT TOO RN!!

@lilithhearts1568 2 жыл бұрын

How did it go? Did you do well in your GCSES?

@Riftshroud 3 жыл бұрын

people who dislike these videos probably just failed their exams and are salty.

@Rust25 3 жыл бұрын

pun intended?

@nobelium4487 3 жыл бұрын

You will never know

@1623tugi 2 жыл бұрын

correeccttt

@t4aha.s 2 жыл бұрын

@@Rust25 lmao

@tsetsekindaanimates1044 2 жыл бұрын

And people who sub are explosive Fans

@jeyderdubz Жыл бұрын

I’ve got a Chemistry exam tomorrow and you are the one person who’s made me more confident in my Chemistry knowledge. I feel ready now, thank you. You’ve taught me more than I learned at school.

@Arsu7ccp 7 ай бұрын

😅how was ur exam?

@jeyderdubz 7 ай бұрын

@@Arsu7ccp I got 84% which was one of the highest marks!!

@eigxhmug Ай бұрын

I don’t get how you don’t have a million subscribers, you are so helpful 😭

@briandean4551 4 жыл бұрын

I failed in Chemistry yesterday but now i feel that you can save me. Thank you so much for this amazing video and great explaination

@Cognitoedu 4 жыл бұрын

Hiya mate, thank you for such a kind comment - and sorry to hear about your struggles with chemistry yesterday! You’re super welcome for the video - really hope they can help you get your head around the main concepts! The most important thing with your revision is not to let it get on top of you :) just do a little bit every day and make sure you understand the bit you’re doing. That way you build up a really solid knowledge base that helps you learn the other material too - everything fits together!! Good luck 🙌

@fat1379 3 жыл бұрын

@@Cognitoedu hi

@sohana.06 3 жыл бұрын

@@Cognitoedu you guys are actually so sweet. thank you so much

@Theredcross007 Жыл бұрын

@@sohana.06 nah ha u lying , u just want him to reply back to your message. U faker

@VASSER574 3 ай бұрын

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@madina8074 2 ай бұрын

Went from a U in chemistry, to a 5 then a 7 thanks to you and free science lessons. Both of you are the reason why i am not failing my sciences!!

@Izzysutch 2 жыл бұрын

I cannot explain how much these videos have helped so far with chemistry and biology I've just started with year 10 and in year 7,8 and 9 I've never been great at science because I am not very good at focusing for long periods of time in class when I get home I will watch your videos and I am completely caught up these are also amazing for revising and such a good length for me to focus and take it in thank u so much

@Cognitoedu 2 жыл бұрын

Ah thank you so much, we're really glad the videos are helping and working for you 👍

@hamzasherasmat6593 8 ай бұрын

That's a good strategy, i don't doubt you didn't get a 9

@xinting_ 2 ай бұрын

Recap (for myself) Alkali metals -grp 1 - soft, low density, low melt/boil points -top is less reactive, doqnwards more reactive - want full valence shell so minus outermost 1 electron (cuz its grp 1) - more reactive downwards as distance between nucleus n valence shell larger Ionic compounds -Ionic bond -white salts, water soluble Reactions Alkali + H²0 → metal hydroxide + hydrogen gas (reacts vigorously) + Cholrine gas → eg. NaCL (vigorous) +Oxygen → metal oxide (eg. Sodium peroxide Na²O² sodium oxide Na²0)

@izzieeeeeep5384 2 жыл бұрын

Thank you so muchhhhhh , love you guys , i turned the post notifications on and am now going to recommend you to my friends!! :D

@Cognitoedu 2 жыл бұрын

Ah thank you so much, we really appreciate it 😊

@jackfairclough5155 4 жыл бұрын

Watching this in 2020 and this is an amazing clip. It portrays everything you need to know in perfect detail so thanks so much

@squidylox4581 4 жыл бұрын

I love the hard work u put in your videos. This helped me in an online school project! You are the MAN!

@Theredcross007 Жыл бұрын

What part of Canada r u from

@mahijasmine4436 2 жыл бұрын

I wonder how this kind of amazing videos been made? I mean which software do they use particularly

@BBlife-sw5qg 4 ай бұрын

feel sorry for the year 11s 6 years ago who didn’t have these videos cus these are saving my exams!!

@icicmgolocc2ndmq194 Жыл бұрын

I really enjoy this video, it helps me a lot, but may you do the other groups as well?

@shehlaabdulbaseer6216 3 жыл бұрын

I have science exam tmrw and this just saved my ass

@Shamshad_16 Ай бұрын

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@maddybashir 4 жыл бұрын

your videos are honestly so helpful, thank you !

@Cognitoedu 4 жыл бұрын

You’re very welcome - thanks for taking the time to leave a comment!

@izzieeeeeep5384 2 жыл бұрын

@@Cognitoedu OMG I’M YOURE BIGGEST FAN

@GhostGecko Жыл бұрын

THIS MAKES SO MUCH SENSE NOW!!!! thank you so much

@hh4251 3 жыл бұрын

I was doing revision and didn’t understand untill I watched ur videos, thanks dude, hopefully I get good grades in my mocks

@hh4251 3 жыл бұрын

I got a C, omg that’s so shit

@iiiyreoroblox7016 2 жыл бұрын

@@hh4251 LMAO im actually sorry to hear that but the sudden change in demeanour is funny ,well at least it was mocks. hope you got good predicted grades

@henryhsil8630 4 жыл бұрын

Literally I am addicted to your channel😂

@bradleyochiel8388 Жыл бұрын

I love Chemistry alot in ure videos i hve been able to understand more about Ionic Bonding thanks so much

@wishmaker3952 2 жыл бұрын

Amazing video You clear the concepts so well Appreciable effort ✨

@Cognitoedu 2 жыл бұрын

Thanks a lot 😊

@haaf_z007 3 жыл бұрын

Cognito i have a chemistry test the coming wednesday. This video is very helpful. Thank you :))))

@videovideoyeah 3 ай бұрын

This helped me so much thanks for making this

@kennethha8173 4 жыл бұрын

your vids are great , i am learning lots

@GriMReapeR-demon Жыл бұрын

I have chemistry exam today and because of you I'm gonna pass thanks for the help.

@sanyuthjayawickrama9547 2 жыл бұрын

Thank you so much this helps me alot in my IGCSEs

@dvrina 3 жыл бұрын

Came back to watch your videos again as for ive got my end of year exams tomorrow!!

@myboysub7866 3 жыл бұрын

This guys like the king of chemistry 🤴 👑

@izzieeeeeep5384 2 жыл бұрын

So true

@opemipoonabanjo 3 жыл бұрын

Thank you for this.......There aren't other videos for group 2 to 7 just like this😩😭

@4dr_14n2 3 жыл бұрын

this is so helpful in a levels too thank you

@urfav_kirou 5 ай бұрын

so short, so helpful, perfect.

@macbookairjeet2070 3 жыл бұрын

This vid was really helpful. Thanks

@humnahnadeem1318 3 жыл бұрын

which video do we watch up to for paper1 of AQA?

@terransage8857 2 жыл бұрын

I’m watching this for fun and I totally did wanna know the peroxide/superoxide stuff

@aamirrashid9715 3 жыл бұрын

This video got used for science lessons in my school

@excelelety2230 3 жыл бұрын

I am actually loving ❤ your videos .Do you give tuitions? Can you also tell us some important points on Igcse exams?

@zahrahassan7023 Жыл бұрын

🤣😂😂😂

@ultraviolet8924 Жыл бұрын

They don't but they have website which is helpful

@nawafalmotairi409 2 жыл бұрын

Thanks a lot I have an exam this Sunday and you helped me a lot never stop pls

@Cognitoedu 2 жыл бұрын

Really happy to hear you’re finding them useful. Thank you!

@UZU919 Жыл бұрын

Seriously how can u not be subbed to this guy

@luna-bj2cx Жыл бұрын

how would you know in an exam when sodium + oxygen will give you sodium oxide or peroxide

@Little_Kyra621 2 жыл бұрын

Thank you so much, my mocks are next week and your explanations are much better than the book, where it's all complicated!

@user-xb2pv5ot8n 11 ай бұрын

You are honestly Godsent 😭😭😭i was supposed to study for chem at 8pm but overslept nd woke up at 01:30 am😭😭😭i have an end of term test at 07:30 tho so this was very much helpful

@allstar2948 2 жыл бұрын

I don’t know but I always find chemistry hard and difficult and all the times I fail it now I have an exam after 5 days and I’m learning and trying to get it from your videos which are very understandable and made me have hope in the coming exam I wish I do better this time

@visiongamer3597 3 жыл бұрын

It has been useful for my classes

@aribanouman9226 3 жыл бұрын

Thank you it really helped me :)

@gamerboyanp_yt9926 3 жыл бұрын

What software do you use for your videos?

@randomyoutuber2702 2 жыл бұрын

I'm so pissed that I didn't discover this channel earlier

@eirinieparaschidis2607 3 жыл бұрын

So helpful!! I've got my end of year exams soon, this is a big help!!

@shizai3604 3 жыл бұрын

me: *turns on subtitles so i can take notes more easier* Cognito: Group one metals also erected rigorously when heated in chlorine gas

@drmariagill 3 жыл бұрын

Saw this 3 days b4 exam. Thank you

@miawindley9106 3 жыл бұрын

Thank you so so much, this was very helpful!!

@Cognitoedu 3 жыл бұрын

Thanks Mia, we're glad you're finding them useful!! 😊

@behappytoday5 Жыл бұрын

Thank youthis helped! God bless!

@djdiamondmind2043 2 жыл бұрын

Is it lithium oxide and lithium peroxide, or is it just for sodium?

@kaylaslifestyle3365 3 жыл бұрын

What are the properties of group 1 element

@yanimales8911 2 жыл бұрын

Great video!!!!

@dammikaabekoon3206 3 жыл бұрын

U my sir is a legend

@trainspotter930 4 жыл бұрын

This is really helpful

@Cognitoedu 4 жыл бұрын

Really happy to hear it - and as always thank you for the comment it really helps the videos get seen 💛

@niquissauvilanculo3970 2 жыл бұрын

Very helpful thank you so much

@afahadd08 3 жыл бұрын

what's the dependent variable in this question

@wildfirek.9725 4 жыл бұрын

Thanks so much!

@Cognitoedu 4 жыл бұрын

You’re super welcome! Thanks for your support 🙌

@seemakumari5832 3 жыл бұрын

Best explainer🔥

@siobhanstrauss8492 Жыл бұрын

Nice presentation 😊

@tega_ovi1 2 жыл бұрын

Thank you so much

@amjadilham4174 3 жыл бұрын

which app do you use?

@ashh636 3 жыл бұрын

this is when my bwain explodes- ( u explained it so well omggg....)

@IraSmith-adams 29 күн бұрын

You explain this muchbetter than my chem teacher

@RuchiraHariyapureddy Жыл бұрын

Cognito is great, honestly I don't know what id do without it

@aadiyajwas5275 Жыл бұрын

I have a question, I understand the trend that as you go down group 1, the reactivity increases however why are alkali metals more reactive than transition metals such as copper (which has multiple charges such as +1, +2 etc). Thank you!!

@ak24032 Жыл бұрын

I think this is because they only have 1 outer shell electron to lose, so it takes less energy than it does for transition metals? Not completely sure myself 😅

@ezzatulhaziyah6645 2 жыл бұрын

I have my GCSE exams in an hour so this is helping me lots

@salmawaseem4120 2 жыл бұрын

Good luck

@hearttwinz4209 Жыл бұрын

How did u do

@ezzatulhaziyah6645 Жыл бұрын

@@hearttwinz4209 um i failed my chemistry it ended up ungraded but im currently working my dream job but will continue my studies to futher explore my dream life

@hearttwinz4209 Жыл бұрын

@@ezzatulhaziyah6645 well I hope u succeed I’m taking my gcse in a couple of months

@azharimran1969 4 жыл бұрын

I have an online test tommorow(its online because of you know what) and this is definitely helping me out! Thanks a lot mate!

@judepeel3822 3 жыл бұрын

Sodium chloride doesn't catch fire when you use it on food because ithe sodium is already oxidised. Sodium metal would catch fire if you put it on your chips...especially if you added vinegar. Likewise rubidium salts are not particularly reactive obviously rubidium is.

@fat1379 3 жыл бұрын

Thanks!

@ahmadshafiqzia2087 3 ай бұрын

What about density down the group?

@soohopark1431 4 жыл бұрын

so easy to understand!!!

@Cognitoedu 4 жыл бұрын

Thank you for the support man - really appreciate it 🙌

@karenshokry3292 2 жыл бұрын

That's because you're smart

@arifshaikhan6227 4 жыл бұрын

At 2:17, is the 'attractive force' called electrostatic force?

@fat1379 3 жыл бұрын

Daddy chill

@mia-simoneslinn7681 Жыл бұрын

Thank you this helped so much. I could not understand what my teacher was saying but this cleared it all up. 👍

@delaniecatton2463 3 жыл бұрын

ughh i really dont understand the last bit about reactions

@annieee8313 3 жыл бұрын

your saving me from failing my test tommorow

@visiongamer3597 3 жыл бұрын

Thank you

@kandibandaharitha3390 2 жыл бұрын

What is GCSE exams tell please. Is this useful to class 10

@pigplayzmc 4 жыл бұрын

thanks

@shopspree5194 3 жыл бұрын

Hey cognitio is this a paper 1 topic

@kritifyexe8265 3 жыл бұрын

1:02 - 1:07 , i beg to differ

@IStillSmileYT 2 жыл бұрын

Mannnn...i feel like god with this knowledge

@serenemuslimah 3 жыл бұрын

I have a question sir!!! My question is why does the melting and boiling points decrease down the group??? Sir,pls answer!!!!

@beha7554 3 жыл бұрын

Hi I know I'm late but the answer is that down the group the atoms are getting bigger and have more shells. This means that the force of attraction between it's shells also decreases ( since they are far away from the nucleus)as a result when we heat them, the forces of attraction between them are so weak that they are easily freed from the forces of attraction and easily form a liquid. I hope it helps

@serenemuslimah 3 жыл бұрын

@@beha7554 Thank you dear sister!

@AnaghaNShah Ай бұрын

2 guys walk into a bar. One guy says “I’ll have H2O” The second guy says “I’ll have H2O too” The second guy dies.

@UmarKhan-ph5og Ай бұрын

I don't get it

@poojan8767 3 жыл бұрын

This video is very helpful sir Thanks fou uplode this video 👌👌👌👌👌👌👌👌👌👌👌👌👌👌👌👌

@Cognitoedu 3 жыл бұрын

Glad we could help Bimesh 👍

@GiaLagasca-dd4qt 3 ай бұрын

@guotongong9715 3 жыл бұрын

amazing

@hanamohamed3563 4 жыл бұрын

This topic became so easy after I watched this video cause I have an exam tomorrow and I’m gonna do great in it

@Cognitoedu 4 жыл бұрын

Hey Hana hope the exam went well! Really happy to hear the vid helped you out :))

@Dynaboy1 Жыл бұрын

So common salt has metal particles, thats interesting

@cqral4229 6 ай бұрын

So we are eating metal when we eat salt

@user-jd7sq8gt8c Жыл бұрын

really helpful

@tvshowedits4220 5 жыл бұрын

Why do the melting and boiling points decrease??

@Cognitoedu 5 жыл бұрын

Hey, you shouldn't have to worry about that for GCSE. But out of interest - it's because the metallic bonding between the metal ions and their delocalised electrons gets weaker. This happens because the ions get larger as you go down the group, so the density of positive ions / negative electrons decreases. So the weaker bonding would require lower temperatures to break. Hope that helps!

@tvshowedits4220 5 жыл бұрын

Cognito thank you very much! Well explained 👍👍

@narsimhareddy6568 4 жыл бұрын

As mp and bp is inversely proportional to size

@fat1379 3 жыл бұрын

@@Cognitoedu tq