Chromium - Periodic Table of Videos
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- čas přidán 29. 05. 2024
- New video on the element Chromium.
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Unmade Podcast: www.unmade.fm
Chromium Trioxide (alarm video): • Chromium Trioxide (FAI...
Losing Fingers: • Losing fingers to chem...
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From the School of Chemistry at The University of Nottingham: bit.ly/NottChem
With thanks to the Garfield Weston Foundation
Periodic Videos films are by video journalist Brady Haran: www.bradyharan.com/
Brady's Blog: www.bradyharanblog.com
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These videos are made by Brady Haran - check out his "Unmade Podcast" here: bit.ly/UnmadePlaylist
Ok thanks! I will definitely check it out🤯😌🙂🙃
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
no
6_hf
"... and the bottle says: CAREFUL, EXPLOSIVE.
So neil heated it"
Yeah. Loved this.
Lol, Neil's badass
"and the NSA says...." 😝
"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.
Maybe he should have warned him but that's no fun lol
Every single video
“I persuaded Neil”
Im the guy who turned your 99 likes into 100
@Potato Servant dude your user name xD
I envision that every such persuasion has Prof Poliakoff speaking eloquently, and Neil just nodding and grunting.
And I'm the guy who turned your 199 likes to 200
Martha Kristiani I’m the guy who’s finding who asked
HAPPY BIRTHDAY PROFESSOR! WE LOVE YOU!
Is he 70 now?
Time to celebrate another solar orbit complete!
I'd love to do things this awesome at that age.
Belated birthday greetings Professor!
Is he 70 now?
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.
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.
@@emilychb6621 nice
back before socialists made everything illegal
Tiktokers would try to drink it
Your enthusiasm for chemistry good sir makes me wish I had more teachers like you during my time at school!
Check out Wal Thornhill.
College and University teachers really care about what they teach and genuinely enjoy it. Other teachers could probably care less
@@LunaTheStarsthat is a very general statement and definitely not the case everywhere
This is the most touching video of the whole series. Prof' Poliakoff's enthusiasm for his early research is wonderful.
sp3ccylad , I was thinking the same, but you put it best!
It's heartwarming to see the deep love that the Professor has for chemistry. Thank you.
Neil is the unsung hero of Periodic Tables....He should be aworded a gold Blue peter badge.
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.
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!
Well seems you and I have the same plan for the holidays. Cheers!
Jim! Is that why you have no videos? I subscribed to your channel! #14. Hee hee!
This really made me chuckle
So..
H-H
H-C-C-O-H = HO HO HO
H-H
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
I love this guy, he should have his own show. He explains things very well and has that personality for television.
Peter, Ditto on that. I wish I had the knowledge of the Professor & the others.
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.
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.
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.
"Neil nearly caught fire...."
Yep, it's Christmas
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!)
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
He already has number Phillie
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.
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.
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.
Cypher Caliban tell Rowboat Girlyman I said hello
(I just got my 8th edition Codex in the mail today, btw)
LALALALALA
Brady everything is looking crispy clear.
Well, as all the flames went onto the GoPro camera, that footage was especially "crispy", eh? ;)
12:04 wow he has always had that mad scientist hair, he was born for this job.
Lov you professor Poliakoff
No mention of the infamous "Institutional Green" paint that was used in just about every hospital, school, university, and sanitarium for 40+ years?
This channel has taught me more than my actual chemistry teacher thx so much keep up the good work
Your cliche comment is cringier than Jake Paul!
Hartsock Thomson u try having my chemistry teacher for a term
U’ll see cringe
Hartsock Thomson, your reply was fairly lackluster. Improve your insults please.
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.
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.
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!
Can we get an interview with Neil then?
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!
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!
I love how the professor has always looked like a bit of a mad scientist with the crazy hair.
Absolutely amazing. A brain box with an amazing personality and great buddies to go along the journey with.
Chromium trioxide is so gorgeous! That color deep red! Very dark blood red, very reactive, with awesome flames. Wow.
your childlike enthusiasm is dangerously contagious
Happy birthday professor🎂
I could just sit here and listen to Professor Poliakoff say “chromium” over and over again. :-)
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.
Hey there were some meteors witnessed in Ireland around that time too, where you from?
Probably Magnesium and Sodium
leonid.arc.nasa.gov/meteorcolors.jpg
Interesting. I'm was just east of Birmingham, Alabama, USA.
Thanks. Nice link.
Green to me speaks copper
Yay early squad 🎆😎. Always a pleasure to see professor. Belated happy birthday professor from India.
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
I don't understand anything that he is saying, but I watch just for the way he speaks, so satisfying.
Happy birthday and thanks so much for these great videos! One of my favorite channels and you only get better!
Neil always makes my day better.
I always smile when I see a new video in my feed. These make me so happy!
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.
This is one of the most valuable channels of the entire CZcams world. I can not thank you enough.
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!
I really learn a lot from these videos. The prof really knows how to make chemistry understandable.
There is nothing better than a unabashedly enthusiastic and passionate professor!
Happy birthday to the professor, and congrats on 1 million subscribers! I'm really enjoying these updated videos. Great work!
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.
Neil's other job used to be being The Stig.
Eliphas Leary you deserve more than 1 like. So I'll give you another creating a fake account right now.
Hi👋
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!
I love the crew's enthusiasm. Keep up the great work👍
Professor getting a few subtle jabs in at poor Neil's expense. Seems that even academia is not immune to CZcams drama. ;)
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. :)
11:37 if you mixed it up properly, like Neil hadn't lol
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.
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
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.
As always, Professor is making chemistry so much more interesting. Happy Birthday and all the best, Professor..!
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 :)
One of the best and most fun videos on this channel. Well done! :)
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!
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.
OxyDon: An Oxygen Donar. "Chromium triOxide is an oxidonic oxidizer."
.
[Thank You for the wordly inspiration Professor]
Listening to Dr. Poliakoff's research is always a delight!
I am just embarking on science in a school setting, and I find this very fascinating! Thumbs up!
Happy birthday 🎁⏳
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...
Congrats Brady & Professor Poliakoff. one million... Well deserved for much loved content :-)
Happy belated birthday Professor! And congratulations on your subscriber count!
I can listen to the professor all day. Thank you all :)
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!
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.
Congrats to 1M! Well deserved!
Thanks for sharing! I am every time happy then I learn au noble gaz reaction!
Happy birthday Prof!
Always love watching these videos. I'd love to be at one of the Professor's lectures, seems like it'd be an amazing experience.
Professor you are one of my heros! These videos have sparked my interest in science! I would love to meet you and just hear stories of interesting experiments you've done!
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!
Amazing colors and forms.
Thank you for these resources.
This channel I'd wager to say is one of the very best out there.
I just love the professor like I don't get bored
thank you for this video, and so many others. wise old man. you inspire me.
What an honor and pleasure it would be to meet these wonderful people in person!
I just found this channel and I love it
I saw that Prof Poliakoff is giving a talk at my university. Never thought I would see him in person one day!
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.”
I could watch this genius all day.
this is so cool being able to understand what you are talking about because i'm taking honors chemistry right now.
I think it's lovely seeing the yellow reaction in the beaker. The differential geometric equations describing the the shapes in the water would be fascinating to see. it's all beautiful. I could watch all day playing with these things, for no real purpose, just wasting time.
That brings back memories from first semester. We had to do a lot of experiments and qualitive and quantitative analyses with cromate and dichromate. The experiments were really nice but we had a lot of chromate waste that we had to dispose properly. A pretty messy and slow process that blocked half of our fume cupboards and most of our beakers and funnels. Although the chemistry of chromium can be very beautiful and interessting, every time chromium compounds are mentioned a little alarm bell gets off ; )
You are the best!!!!! I love to listen to you talk. I am jeweler.I have degree my daughter is science teacher. Keep going.
Congrats on 1 Million! Love the video too
"I'm happy to report that our GoPro survived"
Prof. Poliakoff is just great xD
Awesome ! We made some chrome green in last weeks school lab.
As a young boy I never payed attention in school,especially in chemistry classes...But these videos keep me so focused on the subject :)
One thing that is really underappreciated about chromium is the lower oxidation states of chromium, mostly chromium(III) for its beautiful color (mostly in various purple-violet hues) and stable complexes, and rich inorganic chemistry (catalysts, photochemistry). And also the more exotic species like the quadruple-bond forming chromium(II), and the negative oxidation state when bonded with carbon monoxide.
Professor, the electronic configuration of Cr is [Ar]3d5 4s1, so there are 5 d electrons and 1 s electron.
It's rare to spot an error from the professor! Chromium is 3d5 4s1 not 3d4 4s2 (at time 5:05)
CONGRATS FOR 1M!!!! CONGRATS FOR YOUR BIRTHDAY!!! WE LOVE YOU!!!!!
Chromium is a chemical element with atomic number 24 and represented by the symbol Cr in the Periodic Table. Chromium is a lustrous, hard metal that has a silver-grey colour. It has a high melting point.
Have a great birthday, Professor! Hope we can all celebrate many more with you!
Love Argon so much......... The blue Argon is such a brilliant blue color