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

[@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.

[@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

[@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!

[@Videohead-eq5cy]

"Neil nearly caught fire" I'm on the floor🤣🤣🤣🤣🤣

[@mrthunt5770]

Simply splendid.

[@MrZooganopolos]

I hadn't known Xenon reacted with transition metals. You learn something new everyday....

[@Marc-tp9xv]

Could you also do a video about superions or anything that has to do with the different phases of Ice, cant wait to see and so as your videos in future

[@user-bm9hf2bs5l]

1.What are the products of the reaction :NaCrO4+H2O2+H2SO4 =??2.When adding the sodium chromate to the copper sulfate solution , what is the green solution that results from that?3.On future videos , could you present, at least in the description of the video , the equations of the chemical reactions that are performed by Neil?4.Is there any chace that I can get a PDF copy of the periodic table that is used in the begging of the video?

[@theomoules8185]

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

[@tankhoanguyen5249]

I'm interested in this channel with amazing experiments,

[@fakeaccount8615]

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

[@sathya7951]

Lol, Neil's badass

[@oraculox]

"and the NSA says...." 😝

[@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?

[@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

[@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

[@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!

[@TsetsiStoyanova]

Can we get an interview with Neil then?

[@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

[@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

[@TheElectra5000]

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

[@TheChipmunk2008]

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

[@Bishka100]

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

[@GeekmanCA]

Professor getting a few subtle jabs in at poor Neil's expense. Seems that even academia is not immune to KZbin drama. ;)

[@Tindometari]

Well, if he's for the chop, how do I apply for his job? I'm a decent chemist, and I can match him at being quietly sinister. :)

[@moonscar119]

11:37 if you mixed it up properly, like Neil hadn't lol

[@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.

[@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?

[@lseul8812]

Did the professor get a haircut?

[@lucianodebenedictis6014]

how did he dare, he's not a scientist anymore

[@DubGoodness]

Lov you professor Poliakoff

[@chandrakantsharda3525]

Brady everything is looking crispy clear.

[@klaxoncow]

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

[@atharvakulkarni167]

Could you make a video on oxygen-fluorine compounds?

[@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

[@1ukjunglednbraver]

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

[@grendelum]

Every story: _”this wouldn’t be allowed today...”_

[@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.

[@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.

[@danaphanous]

7:01: the secret recipe of coca cola revealed?

[@Shadow81989]

Yes, I was about to write the same! Won't be more unhealthy than the original, I guess. ;-)

[@medcologytutorials2636]

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

[@TCGView]

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

[@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.

[@electronicsNmore]

Love watching these videos!

[@bigchungusdriplord2301]

How didnt more ppl notice this man is a youtuber

[@Brunoenribeiro]

list of elements neil reacts to, until now: - helium - sodium - sulfur - potassium - chromium

[@sauercrowder]

Neil getting less noble all the time

[@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.

[@leokimvideo]

The Element of Mad Max Fury Road war boys. Please witness me!

[@fedorkochemasov4533]

"If you mix it properly... Like Neil hadn't." Oof

[@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

[@smegmalasagna]

I thought Chromium was only just a blue Google Chrome project

[@getprobed838]

VegetableSalad i thought is was the shiny stuff on a bumper...

[@wrnchhead76]

+Chris OConnor it is

[@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

[@squished1879]

"Neil should have known if he had watched my video..." :D

[@Juva96]

Hello Professor Poliakoff! Could you tell if after the Periodic Videos make this success on KZbin the number of matriculas in the courses of Chemistry and Chemical Engineering increased at the University of Nottingham? And also if many students said they chose the course because of your videos. Thanks from Brazil and you still have many videos to come!

[@jeremiahkennedy1683]

Happy birthday 🎁⏳

[@jzeus9842]

7:23 \m/ rock on my dude

[@letgoofwill]

Happy birthday professor🎂

[@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!

[@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.

[@ilostmypie]

It's rare to spot an error from the professor! Chromium is 3d5 4s1 not 3d4 4s2 (at time 5:05)

[@SpencerTwiddy]

at 5:06 he says that it has 4 d electrons and 2 s electrons, shouldn't he have said 5 d electrons and 1 s electron?

[@andreaaristokrates9516]

Spencer Twiddy And new take in three, two, one *clap*

[@yashpandey2018]

Yup you are right

[@Bl00drav3nz]

You seem to be right :o Really weird that the antiparallel spin configuration of the 3d orbital has lower energy than that of the 4s, I did not know that! Edit: Oh wait, there are 5 d orbitals. So the correct statement would be that the antiparallel 4s configuration is energetically higher than just filling up the 3d first.

[@onerelic1337]

it takes more energy for an electron to stay paired, then to be alone in an orbital

[@SpencerTwiddy]

Yeah that sort of thing is actually very common in the d-block. Doesn't affect his explanation too much as he was just referring to valence electrons in general, but still a mistake is a mistake and I thought I'd point it out since no one else was

[@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👋

[@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!

[@martonpinter3738]

11:40 savage

[@midnewt1468]

Google chromium

[@deanwinchest3906]

Your haircut reminds me of Angus *"IT WAS AN EXPERIMENT DAMMIT"*

[@talkingdot]

ahh when he says yes the alarms are off then they go off a split second later I love the professor

[@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!

[@PAhmad99]

*HE HAD A HAIR CUT!!!*

[@randoshus3762]

Which one?

[@klaxoncow]

I'm watching this video with the Chromium web browser! ;D

[@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.

[@WilliamFord972]

Cr(CO)5 reacts with friggin’ argon? What the heck reacts with argon? (Well, Cr(CO)5 apparently).

[@henkmagnetic3103]

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

[@zdiegi5493]

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

[@scunts]

If you don't have a rack of test tubes filled with various compounds above your bed, are you even a chemist?

[@slipstix]

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

[@taboosaboo]

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

[@serioushex3893]

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

[@matthewday7565]

Trying to remember what the Chrome in a Chrome tape is - Chromium Dioxide? - and is Chrome itself magnetic?

[@Cadwaladr]

Type II tapes are CrO2, or at least they were; apparently this is fairly rare these days, and most tapes are a mix of ferric oxide and cobalt.

[@rivitraven]

Chromium is not magnetic unless it is in an alloy with Cobalt, Nickel, or Iron in it.

[@kf8575]

@@rivitraven Iron, yes. Nickel, no. Not magnetic. Austenitic stainless steels?

[@wernerheisenberg1624]

Chromium has 1 electron on 4s and 5 electrons on 3d (so its 4s1 3d5) because of electron promotion

[@polygondon]

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

[@Cynori]

shiny and chrome

[@nathanaelraynard2641]

He cut his hair?

[@UberAlphaSirus]

What one?

[@greensteve9307]

Thank you. I thought I was imagining it!

[@jacobs83133]

Cr is very important, powerful and interesting element. Cheers 🥂😗

[@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!

[@Ranjan_Mohanty]

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

[@frostedfur]

Neil always makes my day better.

[@jamallabarge2665]

Chromium salt color changes brings to mind Manganese salt color changes.

[@Simonelectricfl]

I'm reminded of a saying, "CHROME WON'T GET YOU HOME. My understanding of the saying, a shiny surface does not power a car or motorcycle. It's the things underneath that you dont see that count like the engineand drivetrain. I find this applies to many aspects of life.

[@shaggycan]

Defiling the noble gasses. That's some dirty chemistry.

[@qwertyslapil6957]

Doesnt chromium have 5 electrons in d orbital and 1 in s?

[@PopeLando]

Happy 70th Birthday, Prof!

[@actuallyjohnwick1933]

i thought this video was going to help me with my malware problem

[@NAATHAAN]

“Neil almost caught fire” Neil: 😐🔥

[@jean-pierredeclemy7032]

Bumpers on the Citroen DS are stainless steel not chrome plate.

[@typicalrockhound9887]

Awesome! There was recently a large nickel - copper and chromium deposit found close by behind Elliot Lake Ontario . Hoping for a few mines to open up . In need of it .... For jobs

[@karhukivi]

I thought Elliot Lake was a uranium mining area and that nickel was found in the Sudbury district?

[@flymypg]

I subscribe to the entire BradyNet, but back only Sixty Symbols. I'd really like there to be a BradyNet Patreon so I can more easily support all of Brady's work.

[@izaneitor]

BobC I think it's best the way it is, he can see how channels are doing and allow people to support specific shows It is probably more profitable too.

[@culwin]

Be careful, BradyNet might become sentient.

[@flymypg]

I'm certain BradyNet is already sentient. I'm more worried about what will happen when *I* become sentient!

[@wronger0123]

some might say it already has.

[@labradh]

You got a haircut? Blasphemy.

[@Stettafire]

Looks nice:)

[@psycronizer]

The Prof makes a brief mention of not being allowed to do things these days...I absolutely DESPISE that we have lost so much freedom in that respect, back in those days ...man I wish I was around back then...I know to them at the time it wouldn't probably seem like such a big deal, but they had freedoms that we can only dream of nowadays.....

[@chingghishan5707]

Inert gases. Reacting?!? H..hhwww.... what?!? But it has a full outer shell of electrons?!?

[@yaldabaoth2]

With the later noble gases, the electrons are too far away from the core, so oxygen and fluorine are strong enough to steal them.

[@ChrisDIYerOklahoma]

Thought here...how about a collaboration video with Dr Neil deGrasse Tyson?

[@treespunk]

2:44 A typical chemist's reaction - nothing

[@RonZhang]

2:48 Remember guys: Do not put the oxide into the acid. Put the acid onto the oxide. It's a lot more dangerous to put oxide into acid than acid onto oxide.

[@rud]

Hooray new video, Christmas saved after all.

[@EscapeReels]

Professor, you’ve made me want to be a chemist. I’m too old though...

[@garrysekelli6776]

I was hoping that the Professor would say some comments on the powerful halucinogenic drug Adrenochrome invented by Hunter S Thompson.