Mercury - The STRANGEST LIQUID METAL!

[@BlackHoleForge]

It is so nice to finally put a face on this voice that I know so well.

[@brokenmess9921]

I know, rihht

[@ненуачо-и8в]

мало кто знает, но он вобще-то русский ютубер, который завел англоязычный канал :D

[@BlackHoleForge]

@@ненуачо-и8в Я рад видеть, что он добивается успеха.

[@presenttime9806]

do you belive free energy? which was made by magnet, copper, glass tube & mercury only. 100 years non stop electricity. it is true in now Bangladesh.

[@presenttime9806]

@@brokenmess9921 do you belive free energy? which was made by magnet, copper, glass tube & mercury only. 100 years non stop electricity. it is true in now Bangladesh.

[@MrEHD-fj1bz]

it's a shame that there was no youtube yet when I studied chemistry at university

[@SR-pw6pi]

And I didn't have a cellphone.😐

[@karthikr4183]

I happens don't worry.

[@ronkirk5099]

The image of the mercury vapor in UV light was very interesting and I now realize why our chemistry professor was so adamant about cleaning up every bit of mercury if a thermometer was accidentally broken. I didn't realize it vaporized so readily. I watched many of your videos of the elements, and I have to say, this was one of the most interesting. Thanks!

[@redmadness265]

The UV makes the vapor extremely visible, so while the amount is amolst nothing worth worrying about, it still is something worthy of respect

[@redmadness265]

It also has a really low vapor pressure, so not very much evaporating at room temperature

[@Greg-yu4ij]

3 drops of organic mercury were spilled a researchers glove and it went right through and she died months later. Check out chubbyemu’s video. Terribly dangerous in that form.

[@bocian0]

3:30 this container with 4 grams of Hg weights more than 50 grams

[@tribalismblindsthembutnoty124]

its a 4 gram container, should it be holding water is my guess.

[@squa_81]

YES, makes sense

[@Christs_Apologet]

@@tribalismblindsthembutnoty124 air*

[@tribalismblindsthembutnoty124]

@@Christs_Apologet You are correct, I believe. The container itself is 4 grams

[@piptenstein]

Fajny z ciebie bocian

[@BuildingCenter]

2:46. Whoa. I’ve read about mercury vapor, yet hadn’t visualized it. This is great. Thanks.

[@iamproudtobeindian3342]

Same here

[@billmiller4972]

Was really an eye-opener.

[@Ultravore]

I remember the videos from Cody's Lab. He has so much mercury and did a lot of dangerous stuff with it. And I don't think he was aware of the vapor. I wonder how much of the mercury vapor he was breathing in.

[@billmiller4972]

@@Ultravore You know; I remember working with Mercury in my own lab, and in hindside, I may have been a wee bit careless. But who cares, today is my unbirthday.

[@Metal_Master_YT]

@@Ultravore well clearly it wasn't enough to poison Cody. with how often he messed around with it, and how he didn't get any sign of poisoning, I think Mercury's danger level is quite exaggerated. plus, he DID know it made vapor, he even said it in his videos, he also did his experiments outside, that should be a dead giveaway.

[@MADDLADO1]

That was fascinating seeing Lead ball floating in Mercury. It seemed impossible.

[@jeffwombold9167]

I remember having mercury years ago, and I had dropped a small piece of aluminum foil in a drop of mercury, and I watched it grow the fuzzy crystals up and away from the surface. At that time, I had no idea what was going on, I thought it was oxidizing the aluminum, but I did notice the mercury drop was smaller afterwards. My third grade teacher had 2 pint sized jars on her desk that we observed and held small amounts during science class. My uncle also showed me how to cover a silver dime with it, though by the next day, it turned grey. Back then, we knew it was dangerous, but just don't eat it, and wash your hands thoroughly after handling it. Fun stuff from our childhood.

[@jonmarquez128]

People: Mercury is toxic and can kill you! Cody'slab: Okay! I will place my hands and feet onto an tub of Mercury!

[@adenoorlizaniyamae51]

hahahaa lol :)

[@interbudelblag]

mercury itself is not toxic but vapours. You can literally bathe in mercury. It won't harm you.

[@jeffreyyoung4104]

@@a.........1._.2..__..._.....__ Yes, methyl mercury, a drop or two will do! even through vinyl gloves! Yikes! But methyl mercury is hard to make.

[@caledonianson927]

Spewing forth the party line on the toxicity of quicksilver... If it was so toxic why do certain Hindu sects eat it in vast quantities?

[@jeffreyyoung4104]

@@caledonianson927 Elemental mercury isn't poisonous when eaten, but I wouldn't make it a part of my diet, altho, I did have silver amalgam fillings at one time, and I am still alive!

[@deadlikedisco4726]

Your acting at the beginning of the video was fantastic. Also, great video!

[@martys9972]

If you add equal volumes of mercury and sodium in a test tube and heat it until the sodium melts, they will combine violently (but not explosively) to form a solid chunk of amalgam that can be easily slid out of the test tube. It would be interesting to see what the vapor pressure of mercury is in this amalgam.

[@alaididnalid7660]

"When mercury is exposed to the ear, it actively evaporates"...had to double check my ear for mercury, turns out I misheard! Cool video!

[@silverssonyoutube8438]

Wow didn't know it made vapours. See people here on KZbin putting their hands in it .

[@Jesus_paid_it_all]

In other words Cody's lab.

[@xx_redwood_xx9737]

Putting your hands in it is a lot safer than breathing the vapors. I think Cody usually doesn't expose himself for very long

[@xi-Jinping-1st]

@@xx_redwood_xx9737 he puts it in his mouth 😂

[@cassandra2860]

@@xi-Jinping-1st He did that once.

[@loganwolv3393]

8:06 That reaction looks like one of those evil plants triyng to kill people in some sort of horror movie lmao. That is the coolest reaction i've ever seen.

[@GlaceonStudios]

Also, TETSUOOOOOOOOOO

[@Bildgesmythe]

Thanks again for all your hard work and great videos.

[@Dinnye01]

You basically compressed 3 Nile Red and 4 Cody's lab videos into a quickly digestible video. Nice work!

[@Dinnye01]

And the sponge explanation is better, I must say. And neither of them talked about the vapor detector, so it was nice to see!

[@aqua7222]

Mercury is awesome. It should start a band.

[@khaccanhle1930]

Just stay away from the rectal insertion.

[@KingJellyfishII]

What music group does a cinnabar bracelet play in? A heavy metal rock band

[@ErickC]

Yes, they could write songs about fat-bottomed girls and being champions, even!

[@terryboyer1342]

Konrad Schmidt Or be a planet.

[@karlpron]

Mercury May started a band.

[@Shadobanned4life]

I am pretty sure that I am not the only person that played with mercury when I was a kid. Somehow,we all lived to tell about it. Some years ago I read about a homeowner that somehow broke a natural-gas meter/regulator in his basement,which caused about a teaspoon of mercury being spilled on the concrete floor. Before it was over,the house was evacuated by authorities,a haz-mat team dressed in 'spacesuits' went into the basement and cleaned it up. A major,major production was made over a tiny bit of mercury. I am certain the homeowner wished he'd just cleaned it up himself!

[@quantumleap359]

Thanks so much for this informative video. I used to have a pint or so of mercury. I kept it well back on a shelf in my workshop. I rarely used it, so I got in touch with a lab supply, they bought it from me, paid about 350US$. Good deal, and I probably dodged a mercury poisoning bullet!

[@Blakearmin]

"This container with four grams of mercury weighs more than fifty grams." I'm cracking up!

[@Metal_Master_YT]

lol

[@memorythief1952]

Study your metric system units better...

[@RandomScientist]

he tried to say 4 drops i guess

[@metalbob3335]

May we see an episode on the reactions of electrical current on mecury?

[@thomasneal9291]

go to any hardware store, and buy a mercury switch to play with. or order one online. mercury has excellent conductivity.

[@metalbob3335]

@@daveandrews6670 thanks Dave

[@GoldSrc_]

@@daveandrews6670 "antigravity"? what the fuck are you smoking?

[@GoldSrc_]

@@daveandrews6670 "innocent comment", funny, this was your original reply before you edited it. "Yer and what's your fucken problem, antigravity so fucken what." So, what's this "antigravity" bullshit you claim?

[@GoldSrc_]

@@daveandrews6670 No experiment has verified any of the antigravity claims, and this has been the case for over 80-100 years. "Antigravity" so far only exists in fiction.

[@AngDavies]

While it has a high vapor pressure relative to other metals, it's really not that volatile in the grand scheme of things ~0.2 Pascals- 2 parts per million vapor concentration in a sealed container 15 thousand times less volatile than water, 50 times less volatile than propylene glycol, and only about 20 times more volatile than glycerine. The mercury atoms are just incredibly good at absorbing light. The toxicity of mercury vapor is such that 2ppm is still a very dangerous amount, which is why it's usually considered to be "volatile" and if heated that all goes out the window, but not really in an absolute sense

[@MAINTMAN73]

I'm loving the new videos. It's great to put a face to the voice. The content is great too thank you so much!

[@Mysixofnine]

🍻 cheers dude thanks for all the hard work in making these videos!

[@00Skyfox]

I've heard that a century or two ago when people had no idea how dangerous mercury was, for a novelty people would drink large quantities of liquid mercury just to they could poke their bellies and feel the heavy liquid in their intestines. I have to wonder how many people died from that, and how many outhouse pits got contaminated with mercury. When I was a kid I broke a mercury thermometer, so I kept the mercury to play with, with my bare hands. That probably explains a lot.

[@ReyOfLight]

My dad has an old vial thing of mercury that used to sit in some olden days radio. It’s really fascinating yet scary to hold that thing because it’s so heavy for its size and it would be so dangerous if dropping it or the glass gets cracked in any way. I really wish dad would just give that thing away to a radio museum or just have it disposed of safely because of what it is, and how dangerous it can actually be to have at home where neither of us have the right knowledge nor equipment to deal with the situation should the glass vial break. Considering it’s a very old radio part, I’d probably rather see it safely stored and displayed in a museum for radio history, than just brought to the local dump to be handed in among the dangerous waste. But yeah, we’re kinda stuck with it at the moment... It’s a piece of history, but feels too dangerous to have in a home! Far more mercury in that thing, than it used to be in one of them old fever thermometers I remember from my very young days in the 80’s before we changed to an electric fever thermometer

[@aarashnavabi4749]

FYI, one of my most famous inventions are based off of your video. The tin one. When my company reached out to me to because their tin based solder was getting damaged at liquid nitrogen temperatures.

[@josephmazzeo9413]

As a kid I always questioned the wisdom of taking someone's temperature with a glass tube filled with toxic mercury inside the MOUTH. One bite and you're done!

[@karlpron]

Nice to see you finally :)

[@dgamezonu2693]

Mercury is one of my favorite elements. I have over 7 pounds. New analog thermometers that looks like metal inside use a gallium, indium, tin alloy.

[@jeffreyyoung4104]

I want to see the ultraviolet vapor test done in a vacuum chamber! I bet what we are seeing is the atmosphere reacting to the mercury, and not the mercury letting off vapor. If the mercury was letting off that much vapor, it would evaporate faster than it really can. Also, in a near vacuum, the level does not drop enough to worry about for many months.

[@_SandS_.]

Yeah! Another amazing video! :)

[@Alaska_Gal]

I was born in the 70s, so mercury thermometers were used during my childhood. I remember my parents warning me about mercury, which made me very curious about it. What’s crazy is I also had mercury fillings as a child. We never thought about it. I had them removed/replaced as an adult.

[@ivan-Croatian]

This video is hard to follow because I have zero knowledge about chemicals. But it is still fun to watch. I'm guessing this video would be even more fun to watch for someone who knows about chemicals.

[@Metal_Master_YT]

like me.

[@gabrielwolffe]

What safety procedures and equipment would you recommend for handling mercury? I'm trying to make a Sprengel Pump for experiments with cathode ray tubes, and I want to inhale as little mercury vapor as possible. I've got access to a respirator rated for filtering mercury vapor, goggles, nitrile gloves, and I was thinking of running the apparatus in a freezer at around -20 C; not cold enough to solidify the mercury but hopefully enough to cut down on and contain the vapors. I may also get some sulfur powder in case I need to clean up any spills. Anything else you think would be useful?

[@bernardthedisappointedowl6938]

The amalgamate of Mercury with Brian May produce some impressive rock, ^oo^

[@JohnLeePettimoreIII]

_DAMNED_ impressive!

[@adenoorlizaniyamae51]

couldn't agree more

[@ReyOfLight]

And most definitely a safer Mercury to have in your life lol Huge Queen fan here, seen Queen+Adam live twice. Sadly never got to see Freddie Mercury live because I was only 6 when he passed away

[@damyanyoung3357]

Have you seen the Lighthouses that used mercury to float the Huge Metal light fixtures from the late 1800's to early 1900's? Put mercury in the basin and the steel will float and reduce friction so it spins easier.

[@mecrob9852]

Very excited to see a new video from your channel pop up on my feed.

[@ZopcsakFeri]

Very interesting video! Is vermillion/cinnabar paste used in Chinese/Japanese Calligraphy as a seal paste (mixed with oily fibers?) dangerous? Is there any risk when using it as a seal pigment on paper? Or when touching it by hand?

[@scallopohare9431]

I remember decades ago either my sister or I broke an old thermometer, and then we sat on the bathroom floor playing with the beads of mercury. We had no idea there was anything wrong with doing so!

[@AustralLabs]

I did it a lot of times. Now I understand why I am the way I am today.

[@scallopohare9431]

@@AustralLabs That doesn't sound good!

[@rdlm38]

I have a tilt switch made of a glass capsule with mercury in it, from an old doorbell

[@WDCallahan]

Was it just me or was the sound not synced correctly on this video?

[@gogartymike]

This channel is Thoisoi2. It is the English language version of the standard Thoisoi channel which is in Russian. That's why the lip sync is off.

[@mfree80286]

It got unsynced in the dub step...

[@private9597]

Please make video on Magnesium . I searched on your channel and could not find it .

[@Twatical]

Is the guy talking just background footage or is the audio just that unsynced

[@pauls5745]

yeah I noticed it was dubbed over.

[@CitizenAyellowblue]

English language version of the original Russian video. That’s why it doesn’t seem synced.

[@ibrahimjunaid8317]

Good work man

[@xDR1TeK]

This channel is growing. What can we do with 100% pure alcohol? I'm not sure which type it is. Methanol, or ethanol. Is propanol even a consumer product? What about ketones alkenes and aldehydes? Ester and ether? Make something about those? How about soap using different hydroxides? Plenty of chemistry to go through.

[@RANGOArts]

back in the 80's and 90's we used to collect mercury from thermometers. we break the thermomrter and extract mercury and play with it bare handed. nobody told us it was dangerous. i played with mercury everyday. i put it in my palm and try to catch it.

[@Shaheen_Hassan]

It's safe to touch elemental mercury with bare hands if you don't have any cuts. Just don't drink it or inhale it.

[@interbudelblag]

if you did it outside it was safe.

[@RANGOArts]

no i played with mercury everywhere. and several times.

[@nono-fb8tr]

I guess the worst that happened was you inhaled the vapors. Any brain damage reported?

[@geared2cre8]

Excellent videos, i've never been more interested in science

[@benitoabreu4785]

This is my favorite channel! This guy is a super genius!!!

[@georgiosrinakakis934]

another great video, thank you! Mercury is a very interesting metal! (and also a performer!)

[@samsimington5563]

7:00 Why does it look like it's on fire in the acid?????? 😰😰🔥🔥

[@Equelan2]

I felt sad for mercury when I saw it was struggling to dealing with CN

[@dancoulson6579]

I've seen a video where sodium vapor is illuminated by a sodium lamp. The sodium vapor absorbs the same wavelength of light it emits when it's in a plasma state. Here, the mercury vapor absorbs UV light, casting a shadow onto the luminsecent screen. But Mercuy Vapor also emits UV light when ionized. I wonder if that's the same with all metal vapors? As in their absorbtion band is the same as their emission band when ionized? Due to the fact that sodium vapor absorbs orange light, it actually appears as a blueish gas. I wonder if that's why slimmer fluorescent lamps are also more efficient - because the UV light produced doesn't have to pass through as much mercury vapor that would otherwise re-absorb the light, converting it to heat... I love how a single clip explaining one thing can leave me with many more questions.

[@bgmapper05]

I waited for this video from a long time

[@johno9507]

Who is this un-masked science superhero standing before us? Nice to be able to put a face to the voice. 😀

[@sheetalkumar9445]

Love your videos man!

[@esper649]

Ого, английская версия, давай арабскую))

[@benmcreynolds8581]

I'm curious about the 2 locations found by archeologists. The Chinese tomb with liquid mercury in a design and a underground tunnel in south America that had little pools of liquid mercury. Always such a facinating video.

[@petehafner3844]

Love this channel thanks for posting

[@kourivi]

New setup is much better than old ones 👍 love your videos ,keep it up

[@dallatorretdu]

that table you showed really opened my eyes when it confirmed the fact that 10^6 atoms of silicon can be found every 10^6 atoms of silicon

[@hj-mc5il]

Nice, please continue making videos about all elements!

[@MaxB6851]

Many of the European wars were caused by Mercury in the hats worn by royalty, it sent them mad. the hat makers used mercury to soften leather used in the construction of the hats. Ball Lightning has an affinity for mercury and is often attracted to electrical, mercury contacts exploding them.

[@ravenn8600]

many of the european war were caused by geopolitical reason and consolidation of powers, mercury don't madness it intoxicate

[@midwestchem368]

Mercury is so cool I have a collection of tilt switches that are cool to see. I have used mercuric chloride a handful of times and it's quite an experience. I still leave my hgcl2 in its original containment which came from Russia plus I added 2 extra containers for safe keeping. As an American it seems like a cool collectable to have Russian mail that had mercury salts that I received a few years ago. I really don't use it anymore but maybe one day I'll post a video using it for something. My shock was the weight. 50 grams looks like just a few grams of say magnesium sulfate. Thoisoi your videos are great don't ever stop 😉

[@SebastianJarre]

I don't know if you read the messages. But Starkey, Boyle, Homberg chemists all worked with the mercury to make the Philosopher's Stone. The idea was to purify it and make it evolve after distilling it. I recommend the work of Lawrence Principe to understand the process. Great video!! I congratulate you.

[@robertweekes5783]

8:00 Probably the coolest chemical reaction I’ve ever seen !! 👀

[@sarchlalaith8836]

Quick question... Do you know a metal that is extremely light, like aluminum, but soft, like lead with antimony?

[@karmentolable]

my first contact with mercury was one day that a thermometer broke at my cousin’s place and we started collecting the little drops and since every drop was getting into small places and we couldnt take them out, we were mesmerized to see such thing we spent like 20minutes playing with it before her mother came and spanked us for playing with mercury because it was dangerous... we did not know!

[@xjmg007]

Had a simular experience ha

[@user-qf7qf4re9w]

Mercury is my favourite element...

[@josephwright5921]

Beautiful and deadly. I had 10 pounds of it that I gave away when my wife and I had children.

[@iamproudtobeindian3342]

@@josephwright5921 it could have been sold at a high price

[@nikolaoskeramidas6075]

I love Coppernicium,radium,Uranium,Nptunium,All acteneds,Promithium,Mercury and Francium and Ceasium.But my favourite is Mercury...

[@josephwright5921]

@@iamproudtobeindian3342 I couldn’t find anywhere to sell it back then

[@OGSinisterPotato]

No idea how I got here, but I'm loving it. Great channel

[@richard1113]

8:10 I am immediately reminded of a firework that kids used when I was younger. The first time I saw this was on a sidewalk next to a tree and thought the other kid was somehow harming the tree's root system. This was more black/gray and more well defined than the apparent "Pharaoh's Serpent" displayed here. My guess is that it was the Hg-less version.

[@richard1113]

@TacticalMoonstone I think you are right. And I believe there was a warning label on the old packages. But I've only seen them as a black snake. Not like the one demonstrated in the video.

[@thespaceguyltu690]

i like your vids so much!!

[@bobholland9924]

I've always been fascinated by Mercury I have a friend out here who is 79 years old and when he was a child he played with Mercury and then all his friends played with Mercury it has had no ill effects obviously he's 79 years old and in his active years he was a printer and he invented stuff for printing presses when I say they played with it they used it to clean their coins off and then they would stick as kids do coins in their mouth but now I know it's the fumes very interesting I still think it could be used to make electricity not exactly sure how definitely could be used for levitation I'm pretty sure that the ancients used it in that way but I digress thank you for the information

[@kobold7763]

They say it’s incredibly toxic and hazardous to keep the knowledge of the vril tech at bay. Research hyperborea, and the Thule Society.

[@smokey04200420]

3:28 “This container has 4 g of mercury that weighs more than 50 g” Mercury, 1 pound of which weighs over 10,000 pounds!

[@microwavetransformer6378]

It makes me sad that mercury destroyes gold cause once my grandma broke a thermometer near some gold stuff and mercury destroyed all the gold Good thing is gold then was quite cheep , Bad thing she trew it away :C

[@pauls5745]

great vid and interesting element! I hope we can see one on magnesium at some point

[@mezzanoon]

Its crazy that mercury was the key to discovering oxygen !

[@HifiCentret]

I still use mercury fever thermometer. Battery is always empty on the digital when you need it. I know you can get galinstan and I do have one and good quality (made in Germany) but it's not as easy to shake down. I just take care not to damage the mercury. It's a gem of the past no longer easily obtained. And it's accurate too. The digital you'll never really know if calibration suddenly has shifted.

[@BlondeQtie]

life hack: have more than one battery at home... or remove the battery after every use. i do both of these tips.

[@wieslawkruczala3205]

The lead floating on the mercury was in fact a ball of rusty steel. A lead ball should have gone much deeper, as the difference in density is not that big. 84% of volume should be immersed. I means that around 2/3 of the radius should be above mercury, and 4/3 of the radius should be below. However it is not a good idea to put lead in mercury, since they form alloy. I do not know if the layer of lead oxide can protect lead sufficietly. I would paint lead to prevent contact of the metals. The steal screw also seems to float too high, yet in this situation the surface tension of mercury helps the buoyant force. If I am wrong, please correct me.

[@mohammedumair6512]

Please do a video on tungsten

[@tintinmars4661]

He did ☝️😏

[@edgeeffect]

kzbin.info/www/bejne/m6WvZ5acobiMbpI

[@UncleWermus]

8:11 Ok that's pure nightmare fuel

[@martinjohansen4914]

Nice video

[@N3wbMa5t3r]

I used to "accidentally" break thermometers and play with the mercury...

[@NurulAmin-hm1dp]

Ummmm

[@ryanprisque5021]

dude your videos are amazing thank you

[@chadpotter7939]

I love this channel thank you for sharing so much with us

[@milliemckenzie3034]

The parts of this video which shocked me were 1) mercury giving off vapour, and 2) the lead ball floating!

[@aryanmalik108]

Hello sir, I am Indian. Through KZbin, I am learning so much by watching your videos so far.

[@johnthomas-km2bf]

Another great video!

[@squa_81]

I have a question, why does the guy that talk isn't in phase with the audio?

[@iamproudtobeindian3342]

Because he is speaking russian in video and has put a audio over it

[@squa_81]

@@iamproudtobeindian3342 would make sense.

[@lifewithkiyokoandnatsuki8109]

I suggest you to add some water to the mercury while storage to avoid mercury vapours

[@rameshyadav-qq8sd]

there is a whole book in ancient indian sculptures on mercury is rasashastra cinnebar also use in ancient indian for as lady 's beauty product

[@M1551NGN0]

2:16 Albus Dumbledore and Nicholas When creating the stone

[@analitycs1303]

Excellent your Job....from Chile..!!!

[@renecastro6110]

2:46 I had no idea mercury produced vapors in such a dramatic way. I used to play a lot with mercury when i was a kid. Now i know i probably poisoned myself a little bit!

[@chandrajitkarmakar2333]

Nice Video, @Thoisoi2

[@mattlogue1300]

I've seen a gallon of it before, didn't realize how costly it is.

[@freekingawwsome]

Thank you my friend

[@josephmazzeo9413]

@8:20 - "It's ALIVE!!! - RUN!!!"

[@supertna9154]

Fluorescent lights and energy efficient light bulbs are one of the few modern devices that still contain mercury and if smashed the mercury vapours from the broken light bulb can be lethal that why you should switch to LEDs or Incandescent lights.

[@mernokimuvek]

I will stick with fluorescent lamps. A few milligrams of mercury is harmless. You would need several grams of a souble mercury salt like HgCl2 to be lethal.

[@donrechdediostalibatabchro1944]

Andami na nito, Hg element.. umaagos sa taas ng tubigdagat . Hermes sa pormang vapor. Nagising sa pgkatunaw ng yelo sa Artik. Tula-ulat.

[@Triliton]

I love these videos! Merry xmas :)

[@adenoorlizaniyamae51]

mercury is one of the most interesting elements. Especially when it forms amalgam. but unfortunately it is very dangerous