Some Cr compounds are, some aren't. So called "hexavalent chromium" or Cr(+6) compounds are toxic and carcinogenic. They're a common form of industrial pollution since all of the methods used to refine chromium create Cr(+6) as an intermediate product before finally converting it into metallic chrome. Cr(+6) was used for chrome plating in the past, and still is today. But it's being replaced by "trivalent chrome plating" which is more efficient, less dangerous, and far less polluting.
The one guy reminds me of Matt Stone and Trey Parker's opinions on each episode of Southpark..."This is my *FAVORITE* element..." Nahh just kiddin, all the elements are cool in their own way, I actually have a small chunk of Cobalt my grandfather accquired from the steel mill, looks kinda ordinary actually, but any element in its pure form is cool anyhow.
Yep. tomandjj is correct. ALL elements can have unstable isotopes, like Iron-55 (Fe-55) or Aluminum-26 (Al-26). Cobalt is ferromagnetic. Iron, Cobalt, and Nickel are the 3 ferromagnetic elements. Many other elements are diamagnetic, meaning they repel magnetic objects, like Bismuth (or Bi-209). Bismuth is actually radioactive. It was thought to be stable, but in 2003, it was found to have a half-life of ~19 quintillion years, which is so long, it's treated stable. It decays by alpha emission.
@shidoink I looked it up. The tests are not definitive: the animals developed cancer when the cobalt was placed directly against the muscle under the skin, but didn't get it from eating, drinking or breathing it. Just touching it won't give you cancer.
If steel is alloyed with a certain percentage of Cobal (don't know how much) the steel becomes very resistant to wear and tear. Good quality drill bits are made of cobalt steel alloy.
No, particles and matter are not the same thing. That's what I keep trying to correct, but it doesn't seem to be getting across to you. Particles don't have to be matter, they can be packets of energy instead. Light is the best example, because light isn't made of matter, though it can be particle-like.
The error was in saying that light shows properties of matter and waves when instead light shows properties of particles and waves. Light doesn't show properties of matter, but your statement said it did, which is an error.
If you know about this stuff, then why did you just ask what am I talking about? I keep replying because your initial statement was wrong and because you keep continuing the conversation.
No, it shows properties of both particles and waves. Electromagnetic radiation is not a form of matter; it is generally regarded as energy, on the macroscopic scale, and particles called photons on the atomic scale.
So is electromagnetic radiation a form of matter? Is it tiny single atom particles of a material flying through the air, like light and radio waves or even gamma rays?
you just said it all... it's no different from regular cobalt it's just radioactive... every element has a radioactive isotope the one with the most stable isotopes is tin which has 10 stable isotopes.
Not to mention, Cobalt-60 is so radioactive, it's like, face melting radioactive...And I think he means dangerously radioactive...Everything is radioactive, even our bodies, electrical devices, and light, is radioactive.
all your videos are amazing but i felt this video was too short
MrAditeya 2 days ago
I licked Cobalt ChLoride paper ijn biology :L
zXREAPERSXz 1 month ago
Some Cr compounds are, some aren't. So called "hexavalent chromium" or Cr(+6) compounds are toxic and carcinogenic. They're a common form of industrial pollution since all of the methods used to refine chromium create Cr(+6) as an intermediate product before finally converting it into metallic chrome. Cr(+6) was used for chrome plating in the past, and still is today. But it's being replaced by "trivalent chrome plating" which is more efficient, less dangerous, and far less polluting.
530BigBen 4 months ago
lol
AlChemicalLife 6 months ago
eney body els have a big box bull of chemicals like cobalt arsnic tungsten.ect
AlChemicalLife 6 months ago
my favorite part: "...and the production of color television stopped for some considerable time, until the production restarted"
freeski300 7 months ago
English version of captions needs to be added. Thanks.. Jim
jwillisbarrie 8 months ago
I am disappointed you didn't tell us about how "cobalt blue" came about.
KaslarProductions 9 months ago 3
fookin' fascinating!
kowalityjesus 10 months ago
The one guy reminds me of Matt Stone and Trey Parker's opinions on each episode of Southpark..."This is my *FAVORITE* element..." Nahh just kiddin, all the elements are cool in their own way, I actually have a small chunk of Cobalt my grandfather accquired from the steel mill, looks kinda ordinary actually, but any element in its pure form is cool anyhow.
punishedexistence 11 months ago
Yep. tomandjj is correct. ALL elements can have unstable isotopes, like Iron-55 (Fe-55) or Aluminum-26 (Al-26). Cobalt is ferromagnetic. Iron, Cobalt, and Nickel are the 3 ferromagnetic elements. Many other elements are diamagnetic, meaning they repel magnetic objects, like Bismuth (or Bi-209). Bismuth is actually radioactive. It was thought to be stable, but in 2003, it was found to have a half-life of ~19 quintillion years, which is so long, it's treated stable. It decays by alpha emission.
KarbineKyle 1 year ago
@KarbineKyle you forgot neodymium lol
killeroftheshadows96 5 months ago
I would have thought cobalt was some kind of a blueish color, is it when it burns that it's blue ? or else, why is there blue color named after it :S
Kysonel 1 year ago
i thought cobalt was carcenogenic (spell check?) so whats up with him handling the foil bare handed.
shidoink 1 year ago
@shidoink I looked it up. The tests are not definitive: the animals developed cancer when the cobalt was placed directly against the muscle under the skin, but didn't get it from eating, drinking or breathing it. Just touching it won't give you cancer.
vantarinitel 9 months ago
@vantarinitel Cobalt is an essential mineral. You can't make certain B vitamins without it.
magicstix0r 4 days ago
Oh please update the heck out of this element here. uses in glass and ceramic and the history of the name. at least a flame colour test!
Theadeaus 1 year ago 2
I found out that Cobalt was the first metal to be discovered since ancient times. Mind you, I found this on Wikipedia.
Desmaad 1 year ago
If steel is alloyed with a certain percentage of Cobal (don't know how much) the steel becomes very resistant to wear and tear. Good quality drill bits are made of cobalt steel alloy.
trespire 1 year ago
Sounds like cobalts a fairly rigid foil considering how high the pitch and how (comparatively) loud it was when you bent it
Vennificus 1 year ago
isnt there a colbalt bomb
poppa108 1 year ago
"and the production of television stopped for some considerable time until the production restarted"... ahah. I needed to point this out.
littleconvesefan 2 years ago
What are you talking about
LittleRedF150 1 year ago
I'm a ceramicist and I absolutely adore the blue color you can get when using Cobalt Oxide in glazes :) As well as the carbonate
noxvet 2 years ago 3
yay pretty color tv's
RatzSSSC 2 years ago
Cobalt 60
360fatcats 2 years ago 3
No, particles and matter are not the same thing. That's what I keep trying to correct, but it doesn't seem to be getting across to you. Particles don't have to be matter, they can be packets of energy instead. Light is the best example, because light isn't made of matter, though it can be particle-like.
xanshriekal 2 years ago 2
The error was in saying that light shows properties of matter and waves when instead light shows properties of particles and waves. Light doesn't show properties of matter, but your statement said it did, which is an error.
xanshriekal 2 years ago 2
If you know about this stuff, then why did you just ask what am I talking about? I keep replying because your initial statement was wrong and because you keep continuing the conversation.
xanshriekal 2 years ago 2
Particles and matter are different things. Photons, phonons, and electron holes are often considered particles, but they aren't matter.
xanshriekal 2 years ago 2
No, it shows properties of both particles and waves. Electromagnetic radiation is not a form of matter; it is generally regarded as energy, on the macroscopic scale, and particles called photons on the atomic scale.
xanshriekal 2 years ago 3
This comment has received too many negative votes show
why oh why won't this guy cut his hair?!
rddaos 2 years ago
So is electromagnetic radiation a form of matter? Is it tiny single atom particles of a material flying through the air, like light and radio waves or even gamma rays?
jacobssandy 3 years ago 3
Talk about Cobalt-60! It's radioactive!
saintaureus 3 years ago
you just said it all... it's no different from regular cobalt it's just radioactive... every element has a radioactive isotope the one with the most stable isotopes is tin which has 10 stable isotopes.
tomandjj 3 years ago 23
Not to mention, Cobalt-60 is so radioactive, it's like, face melting radioactive...And I think he means dangerously radioactive...Everything is radioactive, even our bodies, electrical devices, and light, is radioactive.
Xskillna 3 years ago 2
love these videos, i just wish they could each be a bit longer. I subscribed and I am not a chemistry buff per se; but I like these videos.
Charactereyes 3 years ago 4
I love these videos. I wish I had great teachers like this. I plan on watching all the videos. Thanks again.
huntermccartyney 3 years ago 4
seems like there could be an hour or more for these videos, Great Knowledge dissemination idea!!
Neat vids.
archaedemos 3 years ago 42