Chromium - Periodic Table of Videos

[@periodicvideos]

These videos are made by Brady Haran - check out his "Unmade Podcast" here: bit.ly/UnmadePlaylist

[@tcoo6264]

Ok thanks! I will definitely check it out🤯😌🙂🙃

[@arsalanahmed5706]

I have a question for the professor, "sir can u please tell me a chemical method for refining chromite ore and can i use aqua regia to refine chromite ore" Thank you

[@JustLikeYouYT]

no

[@thehulkamaniabrother2.089]

6_hf

[@scotts918]

"Poor Neil's beaker caught fire. He should have known, perhaps, that it would, if he'd watched my video" I've never seen a smirk on this channel before today.

[@chrisman714368]

Maybe he should have warned him but that's no fun lol

[@art44]

HAPPY BIRTHDAY PROFESSOR! WE LOVE YOU!

[@ulriksteenandersen4215]

Is he 70 now?

[@JoelHudson]

Time to celebrate another solar orbit complete!

[@Thoran666]

I'd love to do things this awesome at that age.

[@ThePerradox]

Belated birthday greetings Professor!

[@GoldenArmorYeah]

Is he 70 now?

[@fakeaccount8615]

"... and the bottle says: CAREFUL, EXPLOSIVE. So neil heated it" Yeah. Loved this.

[@sathya7951]

Lol, Neil's badass

[@oraculox]

"and the NSA says...." 😝

[@seanbordenkircher7854]

I find it very humbling and heartening that brilliant chemists and professors can still appreciate the beautiful sights and colors in chemistry. The math is one thing, but nature really can be beautiful.

[@agatasoda]

Your enthusiasm for chemistry good sir makes me wish I had more teachers like you during my time at school!

[@Rajamak]

Check out Wal Thornhill.

[@LunaOfTheStarsMusic]

College and University teachers really care about what they teach and genuinely enjoy it. Other teachers could probably care less

[@bluefire6470]

​@@LunaOfTheStarsMusicthat is a very general statement and definitely not the case everywhere

[@PotatoesAssistant]

Every single video “I persuaded Neil”

[@dubbleyou248]

Im the guy who turned your 99 likes into 100

[@insrtclevrnamehere]

@Potato Servant dude your user name xD

[@Ealsante]

I envision that every such persuasion has Prof Poliakoff speaking eloquently, and Neil just nodding and grunting.

[@panitialucky6689]

And I'm the guy who turned your 199 likes to 200

[@LunaOfTheStarsMusic]

Martha Kristiani I’m the guy who’s finding who asked

[@spyglass1005]

Back in 60's when I was a kid (around 10 years old), my friends and I would ride our bikes to the drug store and buy bottles of ammonium dichromate. Big bottles of the stuff. After a few purchases, the pharmacist finally asked, “what in the world are you kids doing with all this ammonium dichromate anyway?” Oh, we're just making ammonium dichromate volcanos in our back yard. The pharmacist shrugged his shoulders, looked at us directly and warned us to be careful. We were careful and no one got hurt. And that how things went back the day for kids from Lake Wobegon.

[@emilychb6621]

Yea, The pharmacist that owned the pharmacy I did my residency at talked about all the cool things you used to be able to do. Mostly explosives. Until they cracked a window with their black powder, and his mum put a stop to it. We used to do random chemistry 'recipes' from the 18th century 'useful household things' ranging from fireworks to glue to pesticides.

[@goutamboppana961]

@@emilychb6621 nice

[@MikehMike01]

back before socialists made everything illegal

[@bsherman8236]

Tiktokers would try to drink it

[@KK_on_KK]

Dichromate and Chromate (chrome 6) salts are also pretty toxic and highly carcinogenic. Just saying, probably not a bad thing that kids can't buy a drum of it from the corner store.

[@sp3ccylad]

This is the most touching video of the whole series. Prof' Poliakoff's enthusiasm for his early research is wonderful.

[@georgegarcia566]

sp3ccylad , I was thinking the same, but you put it best!

[@TheElectra5000]

It's heartwarming to see the deep love that the Professor has for chemistry. Thank you.

[@AceFoxx]

im from america and im 19 years old and ive been out of school for awhile and i just wanted to say i love your videos and that i continue to watch this videos to this day 4 years later. i love chemistry and i will continue ore videos as they come out. sincerely katherine

[@jimsvideos7201]

Oh gosh what great fun! As an aside "continually adding more ethanol" is pretty much my plan for the holidays; I hope you enjoy yours in whatever manner suits you!

[@IR4TE]

Well seems you and I have the same plan for the holidays. Cheers!

[@videolabguy]

Jim! Is that why you have no videos? I subscribed to your channel! #14. Hee hee!

[@ice010]

This really made me chuckle

[@afrog2666]

So.. H-H H-C-C-O-H = HO HO HO H-H

[@arronviolin]

10:55 “When I was a schoolboy, [. . .].” It sparks in me a joy I can’t quite put into words that his awesome hair was EXACTLY the same at age 16 as it is now.

[@PTQ4Q4Q4Q4]

I love this guy, he should have his own show. He explains things very well and has that personality for television.

[@brucewinningham4959]

Peter, Ditto on that. I wish I had the knowledge of the Professor & the others.

[@Bishka100]

Neil is the unsung hero of Periodic Tables....He should be aworded a gold Blue peter badge.

[@GuyNamedSean]

I love it when the Professor gets to talk about his personal research. He’s got so many interesting stories. It’d be amazing to get some videos going into detail on some of his research projects he’s done.

[@serioushex3893]

i love how sir martyn always says "persuaded" neil. like you really need to persuade him to blow something up xD

[@tonybezanson9625]

I want to thank you for making these videos. Martyns personal experiences just add so much to these and make chemistry even more interesting. Wish i had this guy back in high school.

[@lpsowns]

Congrats on 1 million subscribers! Hope the professor can put the golden play button in his office (but I guess it belongs more to Brady!)

[@chatoyerhuggins2894]

Actually, I'm pretty sure he'd want the professor to get it. On Hello Internet he was mentioning he hoped to get 1m subs for the professor's birthday, so a number of us Tim's came out to subscribe in support. He was also mentioning the plan to update all the older videos on elements, and that seemed pretty interesting too, so it's not necessarily just padding the numbers :P

[@neilchowdhury8619]

He already has number Phillie

[@chandrakantsharda3525]

Brady everything is looking crispy clear.

[@klaxoncow]

Well, as all the flames went onto the GoPro camera, that footage was especially "crispy", eh? ;)

[@henkmagnetic3103]

Absolutely amazing. A brain box with an amazing personality and great buddies to go along the journey with.

[@r.r.n8998]

This channel has taught me more than my actual chemistry teacher thx so much keep up the good work

[@hartsockthomson3334]

Your cliche comment is cringier than Jake Paul!

[@r.r.n8998]

Hartsock Thomson u try having my chemistry teacher for a term U’ll see cringe

[@MelonStomp]

Hartsock Thomson, your reply was fairly lackluster. Improve your insults please.

[@EpicXXProductions]

You don't really learn anything from these videos. You have to have a basic understanding of whats going on to understand the reactions, enough to where you wouldn't be learning anything new, you'd just be seeing something happen that you already know will happen. If you don't know enough to understand the reactions, you won't know it from watching the video considering nothing about it is actually mentioned as these are beginner oriented novelty videos not educational videos, you'd need to spend a long time studying reaction pathways in an actual classroom before it could make any real sense.

[@MelonStomp]

556x45mm NATO, I think these videos are for people who know at the very least basic concepts. Also people who would like to learn about specific elements, and also basic chemistry of specific chemicals.

[@golgarisoul]

Could you make a video explaining transitional metals? I know you are in the middle of your project to update your periodic table videos so I can wait. Cheers.

[@XanTheDragon]

I could certainly use that video. I've been educated to a small extent on the elements and how they tend to generally react in the broad scope. I want to know what makes these sections of the table unique.

[@SpritoftheStairwell]

The simplest answer to why they are arranged in such a way is the valence shells of the elements. The s-block (groups I and II) have s-orbitals as their valence (outermost) shells, the p-block (main group) elements have p-orbitals as their valence shell, and transition metals have d-orbitals as their valence shells. The number of electrons that can go into the d-orbitals and their various energy levels are what cause them to have unique reactivity.

[@SAVikingSA]

Cypher Caliban tell Rowboat Girlyman I said hello (I just got my 8th edition Codex in the mail today, btw)

[@GoldenArmorYeah]

LALALALALA

[@faridmaharramov1996]

I'm your fan for about 7 years from Azerbaijan Republic/Caucasus. You made me love chemistry. Thank you, Professor! Thanks to all your staff!

[@kawzmOS]

I love the addition of Martyn's childhood notes in the video! That was a nice thing to find and put together. I hope he wasn't digging through boxes in his garage for too long! Haha.

[@duramax78]

I could watch this genius all day.

[@ianlee5812]

I remember in my lab, chromic acid was used to convert secondary alcohols to ketones and primary alcohols to carboxylic acids. Pyridinium chlorochromate can convert primary alcohols to aldehydes.

[@MrKapo74]

Today I finally finished my collection of stable elements. You totally inspired me to start my collection and it is truly fantastic and magical to have all the known elements here at home. Keep on inspiring people, best thing in the world!

[@TsetsiStoyanova]

Can we get an interview with Neil then?

[@zdiegi5493]

"I'm happy to report that our GoPro survived" Prof. Poliakoff is just great xD

[@tollertyp7230]

This is one of the most valuable channels of the entire KZbin world. I can not thank you enough.

[@Postghost]

Time to do my traditional 3 yearly binge of all Periodic Videos again, I think.

[@mattpeacock5208]

The best thing in Chem class EVER is when the teacher sets off the fire alarms!!!!

[@jameslee7168]

Not to get off topic, but one of the coolest things I've seen so far on KZbin, was from a channel called Thoisoi2. I absolutely love the channel, and he gets a hold of things like uranium, and plutonium, and does some amazing things. One of the best thing so far, was with alpha particles. Using an ethanol Cloud tank, he managed to get a hold of some thorium tungsten welding rods, and was actually able to show the world real alpha particles, in real time, being emitted from the thorium welding rods!!! The welding rods were the ones with no coating, and were, of course, Radioactive. I got to tell you, that really blew me away, to actually see actual radiation being emitted from something. It blows my mind. 🤯👍 could you imagine an ethanol tank, over the elephant's foot, at Chernobyl, back in the 90s?!?...😁

[@frostedfur]

Neil always makes my day better.

[@DubGoodness]

Lov you professor Poliakoff

[@billiamyoho7866]

you have had an unimaginable effect on me for chemistry as well as many more people.t.y.

[@1ukjunglednbraver]

12:04 wow he has always had that mad scientist hair, he was born for this job.

[@jonp.6131]

There is nothing better than a unabashedly enthusiastic and passionate professor!

[@harry_page]

Sesqui- is the Latin prefix for one and a half, so chromium sesquioxide is chromium and one and a half oxygen, or two chromium, three oxygen; Cr2O3 Interesting use for sesqui-

[@Eliphas_Leary]

That laughter at 4:32 is haunting. If Neal* had another job he would be a Bond villain. *yes, I know, wrong spelling. But most descriptive of the man himself: noble, and oxidation makes him stronger.

[@tybo09]

Neil's other job used to be being The Stig.

[@pietrotettamanti7239]

Eliphas Leary you deserve more than 1 like. So I'll give you another creating a fake account right now.

[@fakeaccount8615]

Hi👋

[@TheChipmunk2008]

"Neil nearly caught fire...." Yep, it's Christmas

[@nab-rk4ob]

I like the new Periodic Table of Videos. I am glad you decided to remake them. I am learning things I was supposed to learn in high school those many years ago.

[@nathanspeer3128]

Happy belated birthday, professor! What a video, I learned a lot, chemistry is a tough class but had awesome experiments-- so thanks for providing education and demonstration beyond what a standard lecture can provide! And congrats on 1M subscribers!

[@sir9integra9jr]

I just took my organic chemistry 1 final exam today. I used H2Cr2O7 to oxidize a primary alcohol group to a carboxylic acid in a synthesis problem!

[@rw501]

Watching your videos has led me to take up chemistry. I’ve always been interested, but never felt compelled to take the time and learn about the subject. Thanks for taking the time to make these videos. Hopefully soon I’ll be making some of my own.

[@snoap]

your childlike enthusiasm is dangerously contagious

[@jacobeamor2052]

I am just embarking on science in a school setting, and I find this very fascinating! Thumbs up!

[@flysubcompact]

Professor, two weeks ago I witnessed the brightest meteor I've ever seen. So intense that I cast a dim shadow as it passed. It was the most amazing pale green. I know this might be more of a astrophyisics question, but I wondered what chemical makeup would show a color like that. Another factor was that it looked like it just skipped off the upper atmosphere, so maybe it was burning yellow and was "greened"" though our blue tinged atmosphere, so green and yellow could have been the real colors as it burned.

[@jamestrotman3238]

Hey there were some meteors witnessed in Ireland around that time too, where you from?

[@koharaisevo3666]

Probably Magnesium and Sodium leonid.arc.nasa.gov/meteorcolors.jpg

[@flysubcompact]

Interesting. I'm was just east of Birmingham, Alabama, USA.

[@flysubcompact]

Thanks. Nice link.

[@Stettafire]

Green to me speaks copper

[@asklar]

regarding finding elements in the 18th and 19th century when the idea of elements first started: how did people know they had a sample of an element and not a compound? or how can you tell, even today? spectroscopy?

[@raffen79]

I really learn a lot from these videos. The prof really knows how to make chemistry understandable.

[@NAATHAAN]

“Neil almost caught fire” Neil: 😐🔥

[@darylcheshire1618]

I remember being lectured by my chemistry teacher in 1975 about the dangers of forming compounds with the noble gases as the energy you put into it will be suddenly released all at once embedding fragments of the containing vessel into my body parts. The lecturing was done in the tone of putting objects into power points or playing with matches. I never forgot it. The lecturerer waved his arms around in an animated discussion.

[@cromptank]

I like how he always has to “convince” Neil. I wonder if this an exaggeration or if Neil is just really skeptical like “Na. Sure it might explode, but like only a little.”

[@rmurphy440m]

I've watched 15 of these videos in a row. Help me.

[@Groucho_Marxist_ASMR]

No mention of the infamous "Institutional Green" paint that was used in just about every hospital, school, university, and sanitarium for 40+ years?

[@benmcreynolds8581]

Chromium trioxide is so gorgeous! That color deep red! Very dark blood red, very reactive, with awesome flames. Wow.

[@Ranjan_Mohanty]

Professor, the electronic configuration of Cr is [Ar]3d5 4s1, so there are 5 d electrons and 1 s electron.

[@serom2217]

I don't understand anything that he is saying, but I watch just for the way he speaks, so satisfying.

[@willawrence27]

The reaction at 6:30 forms a violet peroxo complex of chromium, thought to be [CrO(O2)2(OH)]- if I recall correctly, not two different compounds as stated. This then decomposes to oxygen gas and is reduced to green Cr(III). The peroxo complexes of chromium are awesome and you should make a video dedicated to them in the future!

[@zapfanzapfan]

Congrats to 1M! Well deserved!

[@TCGView]

I love how the professor has always looked like a bit of a mad scientist with the crazy hair.

[@letgoofwill]

Happy birthday professor🎂

[@emilinebelle7811]

I absolutely love this man with the scientist hair. I truly hope he’s happy and comfortable.

[@Keduce22]

Funny I started watching this when I was a school boy ... now Im finished my first postgraduate degree and busy working on my first academic paper (In Computer Science but still ...). Ive always loved chemistry and this channel has been great!

[@BobSmith-s7j]

We need a life update six years on!

[@Keduce22]

😅 well I have a master's degree in computer science (finished this year) and worked for a startup that got acquired this year... Still no publications though ...

[@dawidskrok3345]

Could you Professor describe tle last reaction, the one you did after passing the exams faster than your classmates? I am really curious about it since I can imagine the first one - formation of copper (II) chromate and I'm not quite sure what exactly ammonia does. It may be complexing Cu2+ to [Cu(NH3)4]2+ but I quite don't see what compound is responsible for green colour of bottom solution. Could you explain Professor?

[@tiana5395]

Just a marvelous project! I'm so glad you're putting the love and expertise into making this a more refined legacy for Periodic Videos.

[@cat637d]

What an honor and pleasure it would be to meet these wonderful people in person!

[@Bludgeoned2DEATH2]

Listening to Dr. Poliakoff's research is always a delight!

[@Siarawaszympanemjest]

As always, Professor is making chemistry so much more interesting. Happy Birthday and all the best, Professor..!

[@jameswu6440]

I can listen to the professor all day. Thank you all :)

[@theomoules8185]

5:06 I have been taught that Cr has 5 d orbital electrons and 2 s orbital electrons?

[@polygondon]

That feeling when you're the safety officer and your subordinates don't turn off the fire alarm in the proper chamber.

[@justinwagner3646]

this is so cool being able to understand what you are talking about because i'm taking honors chemistry right now.

[@Slouworker]

I wish he was my chemistry teacher in school, he's so fun and fascinating to listen to I would've become a chemist instead of a failure

[@VectorLog]

i love the fact that he refered to the gopro camera as being "not injured". so i now way with fully confidence that the gopro camera is my favorite character on the show

[@taboosaboo]

OxyDon: An Oxygen Donar. "Chromium triOxide is an oxidonic oxidizer." . [Thank You for the wordly inspiration Professor]

[@ryancapps8958]

Am I mistaken, or does metallic chromium contain one 4S electron, and contain Five 3D electrons? It's the same Aufbau exception as copper.

[@jeremiahkennedy1683]

Happy birthday 🎁⏳

[@saltpot]

Happy birthday to the professor, and congrats on 1 million subscribers! I'm really enjoying these updated videos. Great work!

[@electronicsNmore]

Love watching these videos!

[@bigchungusdriplord2301]

How didnt more ppl notice this man is a youtuber

[@noelwade]

Really enjoy the refocus on updated/longer videos. Awesome not to just see energetic experiments ("yay, fire!"); but also to connect them to things like understanding how our perception of color can be affected by the energy level of electrons - well done!

[@ABurgess]

you know these guys are partying hard when Neil almost catches fire.

[@angelzipp]

Sir, thank you very much for your work and for sharing it. Honestly, when it comes about chemistry, my knowledge is very... very reduced. You have that flame of passion for your work... so contagious, that I am excited with each new episode you publish. The only think that angers me it's my limited knowledge. The same way I discovered astrophysics when I was a kid, when I read my first book of Hubert Reeves. Merry Christmas!

[@astropredo]

CONGRATS FOR 1M!!!! CONGRATS FOR YOUR BIRTHDAY!!! WE LOVE YOU!!!!!

[@HBC423]

love this channel and your enthusiasm is contagious.. congratulations on 1mil subscribers, I don't know if we're here for the science or because of the professor.

[@DairyAir]

Chromium, aka chrome, is still used for some corrosion protection/looks on the outsides of brass valves, where stainless cannot be used because of chemical reaction. It is also used for industrial applications where wear resistance and very tight tolerances are needed. The chrome plating can be applied in very precise thicknesses, increased flatness of a surface and improved surface finish. For this use, it is not polished to the high luster you’d expect from chrome, so a part may chromed and you wouldn’t ever know. With more precise alloys and machining methods, these uses are also going the way of the horse...

[@razvyrus]

As a young boy I never payed attention in school,especially in chemistry classes...But these videos keep me so focused on the subject :)

[@medcologytutorials2636]

Yay early squad 🎆😎. Always a pleasure to see professor. Belated happy birthday professor from India.

[@rogeliobeltran1742]

I suggest maybe using some Bohr model diagrams for explaining the difference of colors, as well as the S, P and other orbitals in your videos. I think it would help the non-chem majors to understand a bit better. oh and hey happy birthday dude!

[@Pendoza84]

I always smile when I see a new video in my feed. These make me so happy!

[@SeducingJackel]

Congrats Brady & Professor Poliakoff. one million... Well deserved for much loved content :-)

[@kidman2505]

This channel I'd wager to say is one of the very best out there.

[@flaplaya]

Merry Christmas all you one million people. Congrats The University of Nottingham chemistry lab. Get out of life what you put in. Amazing work, thank you guys and gals for the always intriguing videos. Peace on Earth :)

[@PopeLando]

Happy 70th Birthday, Prof!

[@slipstix]

Wait 3d4 and 4s2. I thought Cr was an exception 3d5 and 4s1. Can you clear up?

[@rud]

Hooray new video, Christmas saved after all.

[@elizabethorman86]

Happy birthday and thanks so much for these great videos! One of my favorite channels and you only get better!

[@jsullivan05]

Literally first channel I subbed to years ago, SixtySymbols was #2, so happy for you that you passed a milli bud.

[@williamharris9196]

Chrome played a small part in my life, as well. As a kid growing up in the 1970s and 1980s, I had to wash my dad's van before we went on vacation every year and my mom's car every now and then. Back in those days vehicles had some very wide chrome bumpers! I was not always very excited about chrome back in those days! :(