Why Molybdenum is named after Lead - Periodic Table of Videos

[@periodicvideos]

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[@laurenouellette6592]

It seems like technetium isn't available as a sponsorship level on Patreon. Is that intentional?

[@harimaj569]

Nice to see our professor doing well. What legend he is, he had a huge impact on many generations. Long life prof. Martin

[@matthewhambone3577]

Well said 👏

[@usamabinmurad8338]

You said it. Legend....!

[@Boe_Jidens_Hair_Sniffing]

@halwa boi The Nobel Prize doesn't mean anything anymore unfortunately

[@jezzard123]

Totally right, I'll be starting my PhD in chemistry in October and it was KZbin channels like periodic videos with the professor that inspired me to study it in the first place

[@pedroarjona6996]

And his hair have never looked better, I am diying of envy.

[@MalcolmCooks]

I like how the professor never gets any older, his hair just gets bigger and whiter

[@Ihatenewname]

🤣🤣👍

[@SomeGuy-vo7we]

We can estimate the professor's age by counting the growth rings in his hair 😆

[@XB10001]

He is getting older ... you can tell if you watch older videos. It was most noticeable in the past couple of years.

[@christiefru]

The greek word for pencil is ΜΟΛΥΒΙ too. Greetings from a greek chemist!

[@sohenwei6937]

μολύβι!

[@JamilKhan-hk1wl]

Mo aye bee?

[@marksusskind1260]

maw-loo-bee ?

[@georgiost6189]

@@marksusskind1260 maw-lee-vee

[@UnderscoreZeroLP]

@@JamilKhan-hk1wl that "A" is a capital lambda (L sound)

[@sauercrowder]

"I'm at home so I don't have samples of elements." "So here's some molybdenite..."

[@zapfanzapfan]

Still has the mineral collection though...

[@divypatel1002]

Molybdenite is not an element though... But I got what you're trying to say.

[@sauercrowder]

@@divypatel1002 Thank you for your understanding, I'm barely able to form complete sentences

[@Markle2k]

I’ve been following this channel for a decade and more and just now I’m noticing that the Professor is left-handed.

[@AlbrechtAaron]

Just like me

[@DaveTex2375]

For a split second I thought Brian May was going to enlighten me. Hadn't seen this in my recommendations in a while and nearly forgotten about this channel. Great content.

[@catcatcatcatcatcatcatcatcatca]

I wish chemistry was taught as a mystery or puzzle in schools. I think that's the key aspect why these videos are so interesting and enjoyable. Instead of the audience being uninformed and merely informed by an authority who already is informed, we see experiments, tests, or recalling of previous research. It doesn't matter if the subject is history or chemistry, professor never relies on his authority. He uses phrasing like "we were taught in university that...", "I searched up papers about this and they demonstrated..." or "as I was working on this research, I learned...". And often enough the videos make sure to demonstrate the theory anyhow. Ironically it takes immense experience and knowledge to avoid relying on ones own authority to this extent. Most information one knows is just not valid for this kind of teaching, as the basic idea is to share not only that but also why one knows and and where one learned it.

[@karhukivi]

That is the way science is supposed to work! Beliefs, religions, art and politics do not work that way....

[@HayTatsuko]

The story of molybdenum and its etymology was a treat to watch! Thank you, Professor!

[@MillerFourFingers]

"Neil's favorite..." Things like that are why I come here. Neil has a favorite element and The Professor both knows it and is HAPPY about it. That's cool.

[@YaMumsSpecialFriend]

Now that’s my kind of convoluted, Professor, and fascinating, to boot🖖🏼

[@markiangooley]

Over 40 years ago I went to visit the Climax molybdenum mine in Colorado. Basically they’ve crushed most of a mountain to a powder and mixed that with oil and soap (molybdenum and its ores have an affinity for oil) to separate out the molybdenum. Quite messy, although I think they’ve tidied up the tailings quite a lot. The mine was shut for a few years but is operating again.

[@willj1598]

And we're still at it. I'm at the Henderson Mine, which is also owned by Climax Molybdenum. It's a few mountains over. We're one of just a few mines specifically mining Molybdenum. More commonly it is recovered as a byproduct of copper mining. It's one of my favorite elements.

[@AverageAlien]

Straight to the blog

[@watertree1]

Hi professor, thank you for making these vedios. I use your vedio to teach my 12 old child and we both learn a lot. Thank you so much from Taiwan.

[@boboften9952]

Thank You Professor Sir Martyn Poliakoff .

[@N.I.R.A.T.I.A.S.]

"I'm at home, so I don't have samples of elements." I'm not sure that I believe you.

[@invisibledave]

I don't have samples of elements so I went in the house and found some spare lead.

[@OrangeC7]

@@invisibledave "I don't have samples of elements, so I made some myself"

[@millomweb]

So lt's start listing elements he has at home... Clearly, lead, carbon copper (wiring) Iron probably aluminium - although he'll have more ally alloys than elemental ally Tin - steel coating) Zinc - plated something

[@fritzheini9867]

It‘s also one of my favourite elements: In my research, I do optical spectroscopy of heterostructures including MoS2 and MoSe2, which are 2D semiconductors.

[@kyleboschen6220]

A fellow TMD physicist! Where do you work? I'm currently doing my undergrad final year project on Exfoliating WS2 for CMDS experiments at my uni in Melbourne!

[@fritzheini9867]

@@kyleboschen6220 I work at ETH in Zürich, Switzerland. We are interested in optical signatures of correlated electronic states in TMD heterostructures.

[@charlesdickens6706]

....are MoSe and WSe also lubricants ?

[@matioszolom]

I've only now realised that in Polish the word "ołówek" for pencil comes from lead, which is "ołów". Really cool!

[@Matticitt]

Same.

[@01DOGG01]

And in Croatian, olov

[@Yora21]

In German, we literally call them "lead rods".

[@mernok2001]

Lead is Ólom in Hungarian and tin is olowa in Russian I think.Strange huh?

[@ooooneeee]

@@Yora21 I'd rather translate "Bleistift" as "led pen".

[@Gunbudder]

i have a tube of moly-graph which is a grease that uses both graphite and molybdenum. its an excellent lubricant

[@rcolorado2364]

The professor's fro is looking on point today!

[@MrAwawe]

1:20 I thought he was writing something in Greek at first and spent a few seconds pondering what "RTON" meant.

[@pierreabbat6157]

Καγω!

[@mushyomens6885]

Haha overanalyzing

[@nagarajanvaidya9266]

Haha same

[@keyboard_toucher]

what is the meaning of what he wrote?

[@MrAwawe]

@@keyboard_toucher He wrote "PTOV", short for "Periodic Table of Videos"

[@mathiasmilne]

Thanks to Professor P., Neil, and the rest of the Periodic Table of Videos team. Been watching for a number of years and always love to see what interesting things the team is up to. Glad to see that the team is all healthy and able to do some new videos. Cheers!

[@ncot_tech]

I used to live in Keswick and knew of the pencil museum. In fact I even used to live/work in what was a converted graphite mill in Newlands valley which is the next valley over from Borrowdale. It took me this long to realise the mining around that area wasn't just slate, but also graphite. The more you know.

[@karhukivi]

The place is Seathwaite, a very famous mine used by the Royal Navy for cannonball moulds as the moulds didn't break, giving consistent cannonball diameters thus ensuring the gunnery accuracy. Monks used it for writing and shepherds used it to mark sheep. The museum was closed when I tried to visit it.

[@Mysteryskatin]

I'm a firefighter and we use graphite to lubricate our cutters and spreaders. (Jaws of life.) It's strange to think that you can lubricate something with a dry film.

[@christoskettenis880]

My periodic table from school years! Most probably the professor came to Cyprus at some point. KEO is a spirit manufacturing company in Cyprus, mostly known for its beer and St. John's Comandaria. The company supported the effort of ΠΕΕΧ (Pancyprian Union of Chemists) in developing the specific table and it was given to us in 2002 when I was a senior at high school, having chemisty as an elective. Nice video and very accurate pronouciation of the words!

[@befreud]

I'm going to be so sad if the professor ever passes...He had such a huge impact on my love of science and chemistry.

[@danielduncan6806]

It is not a matter of 'if', but of 'when'. Fortunately for him, and more so for us, these videos will be forever.

[@piplow1]

Dont stop doing what you all are doing, from Canada i say thanks for over a decade of knowledge

[@electronicsNmore]

That's the first time I've seen lead sheathed cable like that.

[@louistournas120]

Yes, that is insane. My house has the wires covered in a cotton cloth I think that has a black paint on it. The wires for the bell also had cotton on it and it disintegrated and caused a short circuit and one day, I came home the the bell was ringing none stop.

[@jonathanrichards593]

It was very common in England, at least, when electricity was retrofitted in homes built before electric supply was a thing, and before there was anything resembling plastic insulation. The copper conductors were covered in a cotton and rubber compound for insulation, and then placed in the lead sheathing which could be unrolled and moulded around the existing house structure, such as joists in a roof space. I remember helping my father to remove and replace such wiring in my childhood home - although it still functioned while in place, if you moved it, the insulation had rotted inside, and just crumbled to dust!

[@mernok2001]

In Hungary cloth and rubber insulated wires were used until the 1960sbut those were durable.I have seen some of them in perfect condition.The cloth was impregnated with tar and has a nice smell.

[@MyKharli]

It can go live , i was feeding copper pipe into an attic full of lead sheathed wire , 10 shocks later i found myself unable to touch copper pipe even if i knew it was ok

[@millomweb]

Of course, they use copper nowadays - in 'pyro'. The modern stuff comes with an outer coating of bright orange plastic !

[@MetalMaggot46]

not sure why but this is the first periodic videos new video i've gotten in my sub feed for like over a year. I thought you guys stopped uploading

[@matthewhambone3577]

Never ending😜 keep up the great work thank you

[@qtheplatypus]

I like how graphite basically means “writing stuff”.

[@hipparchos]

and the verb γραφω= to write is probably echomimetic. So graphite would mean stuff that makes the grch, grch sound (or whatever you wanna spell it) when you scratch it on the writing surface

[@peetjason6671]

Graffiti = graphite

[@EdMcF1]

There is a pencil museum in the Lake District, I'm told it's quite graphic.

[@_Wombat]

Been there. Much more interesting than you'd expect! They have the world largest pencil :)

[@jamesdriscoll_tmp1515]

Write on!

[@AsbestosMuffins]

off with you, go on!

[@ooooneeee]

😂🤣

[@QlueDuPlessis]

I first learnt of molybdenum from the film based on the play, Paint Your Wagon. The town, named after the metal, was called Molly Be Damned.

[@robertschlesinger1342]

Excellent video. Very interesting, informative and worthwhile video.

[@Ov3rTheTop]

So interesting! The way language plays into science here is awesome

[@PopeLando]

At this time of year I expected the Prof's hair to blow away, like a dandelion.

[@alternamasaki429]

Outstanding hairstyle, Professor. Quite literally.

[@JurisKankalis]

What a brilliant guy. In case my kid struggles with chemistry a couple of years from now, I'll make him watch this channel.

[@charlesdickens6706]

.....also try to get hold of stuff like some of those time/life educational books from 1960s ,, there was one titled Matter covering chemistry then one titled Physics then Energy then Mathematics..Electricity n Magnetism...... The range of books is extensive and was part of a government push to compete with the Soviets . Generally all textbooks and educational books before the 1970s are the best but simply get thrown out from deceased estates . Actually some examples of Soviet books are Experiments without Explosions and Tales About Metals by Venetsky if I recall . A British book from early 1900s titled The Young Chemist has been reprinted often .

[@peteacher52]

Prof Polikaoff, you certainly have the appearance of the archetypal professor though much better groomed, but there is nothing whatsoever of 'madness' in your erudite yet gentle mini-lectures.

[@ElBach1y]

My dad told me when molykote (or molybdenum oil additive) came out in Argentina they did a demonstration where they ran an old jeep without oil, it failed immediately, and then they only added the additive (no oil) and it ran! What a great element molybdenum

[@AdityaMehendale]

Prof., can you do a video explaining why metals like Mo have a high melting point, whereas others like Pb have it lower? Are there any interesting trends or outliers to the general reasoning?

[@movax20h]

MoS2 beyond used in greeses for lubrication, recently got a lot of attention as a potential semiconductor of the future, being better than Silicon or Graphene.

[@charlesdickens6706]

....all the metal sulphides have interesting properties . CdS makes light dependent resistors , ZnS makes glows in dark following light exposure , calcium sulphide removes hair ,CuS is photoelectric ....

[@someoneontheinternet5392]

MOH-lee-vthos (th as in "the") Moh-lee-VTHE-nee-o (The capitalized "e" as in echo) I'm Greek. Hope this helps. Glad to see the professor doing well!

[@arcanics1971]

Graphite is also used as a lubricant for steel/brass stringed instruments. For example in the string grooves of a guitar's nut.

[@someone2506]

Yup, used as a "dry" lubricant on rarely moving surfaces, more like an anti-seize and a "soft" filler (reduces vibrations in tensioners). Dry means that it won't collect dust and turn into an ugly and abrasive goo.

[@Yora21]

I believe it's because graphite consist of carbon sheets that are one atom thick and very strong, but individual sheets separate very easily. So you have them basically delaminate very easily and then the sheets moving across each other very smoothly.

[@therocinante3443]

It's always such a pleasure seeing the professor :)

[@Keeping_IT_Simple]

Great video Sir.. Have watched the other molybdenum wire video & wondering if you ever persuaded Neil to try altering the frequency of the current , turn the wire vertically, as well as try DC ? If not perhaps you folks could add such a video to your to-do list please ?

[@KomradeCPU]

I love you professor, hope you can provide us with these awesome videos for a long time. S2

[@kensurrency2564]

I’ve always wondered where that name came from. Never worked with it before, so I didn’t dig into the etymology. Now we know! Thank you, Professor!!!

[@carolnorton2551]

I always love Professor Martyn's videos.

[@cmdr_scotty]

I've used Molybdenum quite often in the grease used for CV axels (MoS2) really cool to see what it looks like in raw form :)

[@ekaterina96_]

You made my day professor!

[@cambriakilgannon12]

Martyn's hair is looking especially floofy and majestic in this video!

[@panykfelidae9018]

thank you, I was afraid I was the only one whose initial thoughts were 'WOW, HE GOT FLUFFIER'

[@jpdemer5]

You can tell what the weather in England is like by checking Prof. Polikaoff's hair.

[@Leo-if5tn]

Professor is such a smart person

[@qubex]

When I lived in southern China for three and a half years I somehow ended up with molybdenum poisoning, presumably from polluted water. I never drank tap water but I rarely cooked at home so who knows how the cooking was done… but there’s also the possibility that it was due to severe repeated skin exposure (perhaps all the showering because of the tropical conditions?) Anyway, very unpleasant.

[@evilsharkey8954]

Maybe someone was trying to off you.

[@z-beeblebrox]

*People in the 1800s:* "You found a new material that can make marks on paper? Sounds like lead to me."

[@greg4712]

Your hair is outstanding, Professor.

[@inesis]

and upstanding too...

[@theFLCLguy]

It hides his big brain.

[@dasbroisku]

It is wonderful!

[@philipemmons3580]

You stole the words out of my mouth you thief

[@evilsharkey8954]

He’s had that puffy hair since he was a young man.

[@MCPhssthpok]

My father had one of those graphite policemen. It was used to lubricate locks if I remember correctly.

[@MCPhssthpok]

I should have watched to the end before commenting!

[@Ryniano]

There needs to be a huge playlist of fun but informational youtube videos and I would just become so much smarter binge watching it

[@PsRohrbaugh]

These videos are a treasure. Thank you, professor!

[@sadrevolution]

The professor's hair game is on point!

[@revenevan11]

That periodic table of patrons is a really nice idea!!!

[@jakobvonanka7981]

Watching these videos makes me want to study chemistry again, it was something that I really liked doing.

[@LeifHart]

So glad to see this video pop up!

[@turdferguson8095]

I wish I'd have kept studying chemistry and physics. It's so fascinating. Internet web marketing is not nearly as fulfilling, but pays the bills. Keep 'em coming, professor! Love this channel!

[@jiioannidis7215]

The periodic table section of the volume Matter, from the Time-Life Science Library, explained the etymology of Molybdenum! I knew that as a kid in the early 70s!

[@charlesdickens6706]

......that range of time/life books is some of the best educational literature ever compiled in the English world . It rivals the Russian stuff . In the sixties it was evident that American youth were scientifically illiterate and the Russians might get ahead in the space race . Those books were part of a strategy to advance science literacy .They never foresaw the hippy revolution though . Schools went crazy with new teaching ideas which didn't work. Sesame Street saved the day though .

[@JimHendrickson]

This video gives me an idea for a new series: Drawing with the Elements by Professor Polikaoff.

[@Yora21]

I wonder how many interesting and safe paint pigments you can make from various elements. Many probably wouldn't be economical with much cheaper alternatives, but small amounts for demonstrations would be cool.

[@krissteel4074]

Molybdenum is a hugely important element in alloying steels and industrial development, it increases the metal's strength particularly under high temps, deeper hardening for austenite steels, assists in welding and confers quite a lot of corrosion resistance.

[@WineScrounger]

Molybdenum disulphide is specifically an excellent high pressure, high temperature lubricant. You’ll find it in constant velocity driveshaft joints. It’s the black grease that never washes out of anything.

[@alexpotts6520]

I find "molybdenum" easy enough to say on its own, but I do struggle a bit to recite the "manganese and mercury, molybdenum, magnesium" line from The Elements.

[@jesperlett]

The word “plumber” also comes from the Latin word for lead “plumbum”.

[@vinh7251]

Plumbing and plumbers are so called because the pipework that used to carry water in buildings were manufactured from lead as it was cheaper and easier to work than copper. A couple of my friends lived in an old cottage where the incoming water main was still run in a lead pipe and I believe plumbers are still required to train in how to connect copper pipework to lead because there is still so much lead pipework around in the UK. Large underground pipes were often ceramic that was internally glazed to reduce water loss as these had to survive being buried without deforming and so needed to be stiffer than lead.

[@FutureChaosTV]

@@vinh7251 The UK still poisons the population with lead?

[@tookitogo]

@@FutureChaosTV It’s common in old installations around the world, and is normally more-or-less safe, because the pipes get “lined” with a layer of mineral deposits within a short period of time, preventing the water from being in contact with the lead itself. (In Flint, what went wrong is a sudden, substantial change in the water chemistry (rendering it more acidic), which dissolved away the mineral layer, and then allowed the more acidic water to contact the lead.)

[@JmaxC85]

Love the garden Professor! ✌🏾

[@ZakeriasRowlandJones]

The professor is a national treasure.

If they decided to go with the Latin name "plumbum" something similar would happen with Mo-Pb names, but in Spanish instead of Greek. (Pb is "plomo" in Spanish).

[@RestorationWatch]

Dear Professor Polikaoff, can you please give your opinion on the use of molybdenum disulphide as a so-called "friction modifier" being added to auto engine oils to decrease internal friction and extend engine life? Thanks for all the great videos, I've watched them all with great interest.

[@HalSchirmer]

Molybdenum motorcycle grease is part of the pun about "Red Molly" in Richard Thompson's song "1952 Vincent Black Lightning"...

[@charlieprevost]

Question about compound naming: Why is it molybdenum disulfide (an ionic compound) rather than molybdenum IV sulfide?

[@jasperjones6857]

I studied ancient Greek, too. And the professor told us modern Greek speakers would understand it. And the few times I tried this, it worked. Try Chaucerian English in NYC. You will not be understood. Great video as always.

[@shreksta303]

Love the videos, especially when the Prof. makes an appearance. Cheers

[@kylo_ben]

Always awesome to see the Professor

[@laineschonauer1795]

I'd like to see a video on Molybdenum (ii) acetate! The Mo-Mo quadruple bond feels like magic.

[@Yora21]

Molybdenum is by far the most exotic element that professional gardeners have to learn about in their education. The main elements plants are made of are Hydrogen, Carbon, and Oxygen (air and water) and the primary fertilizers Nitrogen, Phosphorous, Potassium, and Magnesium are all stuff you encounter all the time if you have just a passing interest in chemistry. Zink, Copper, and Chlorine are also familiar element, and I think most people might at least have heard of Manganese. But Boron and Molybdenum really stand out as stuff I've never encountered in any other context before.

[@davidgillies620]

I notice that the Greek for mercury is hydrargyros whence the symbol (although strictly speaking the etymology is via the Latinised form of the Greek). A bit of Greek and Latin helps with some of the symbols (Na, K, Sn, Sb, Fe, Au etc.) and some of the names like chromium, iridium and xenon.

[@offdagrid877]

Another fascinating video thank you

[@jfo738]

Interestingly, in the mountains of Colorado, the Climax mine was once the largest producer of molybdenite in the world and is located just outside the town of Leadville, CO (which got it's name from lead deposits in the area).

[@greensteve9307]

I thought they were called lead pencil because of the similar colour! Never would have guessed that you could write with lead. Great vid.

[@june-ls1hw]

Wonderful video. I will always love these :)

[@spatuloso]

How after all these years have I not realized the Professor is left handed! XD

[@OnTheShouldersofScience]

Haha, I never noticed either!

[@AgentWaltonSimons]

Moly Dee, THE FINEST MACHINING ASSISTANT YET DEVISED BY NATURE AND THE SKILL OF MAN

[@ObsoleteVodka]

L U B R I C I T Y

[@captainahab1533]

The German word for pencil is actually “Bleistift” which translates to “lead pen"

[@leokimvideo]

I was expecting the chat to go down a graphene bunny hole but the professor wisely avoided it

[@MrGrogee]

And here we see the Professor in his natural habitat. When happy, the Professor's hair radius reaches its maxima.

[@cherylmason1962]

Please please please do a video of your morning hair routine i am obssessed with you and your hair 😍😍

[@cepson]

It's also called "Molly-be-damned". Well, at least in The Brothers O'Toole historical documentary it was.

[@lancecrawford6004]

Very informative. Thanks

[@Matticitt]

What just blew my mind is that, in my language, the word for pencil is also derived from the word for lead, and it's quite obvious, but I never made a connection untill now.

[@yyunko7764]

polish?

[@Matticitt]

@@yyunko7764 yeah

[@GratefulNachos]

Graphite is used as a dry lubricant for the seed in row crop planters.

[@eddjordan2399]

i love this channel

[@glenngriffon8032]

So it's Niel's favorite element? Everyone, reply with what your favorite element is and why. Mine is Carbon because it's such a very versatile element. It can do so much from supporting life to keeping the planet warm, letting us write and draw, helping warm and power our homes, graphite is used as control rods in nuclear power plants, without Carbon we don't have petroleum to drive our civilization. It is the foundation of all life on the planet.

[@philipemmons3580]

Oh my gosh I'm so glad to know that you're alive and healthy and I hope everyone else on this channel involved are also I've really been worried for quite a while and I've been like questioning if you guys have been safe and like healthy continue to wear masks when possible for real

[@lucky43113]

Who cares about a worthless mask

[@philipemmons3580]

@@lucky43113 and your the type of person who is contributing to the deaths of other people's loved ones congrats

[@_rlb]

I was not ready to see the professor's hair like that. But I love it.

[@benstewart6413]

PTOV - Periodic Table Of Videos.

[@beeble2003]

Ohhhhh. I was thinking it was some kind of Greek or Russian word! :facepalm:

[@danf16dcc38]

I believe molybdenum is used in certian race car frames. It is also used as moly wire in wire edm for the very strong tencile strength

[@spearhead30]

Thank you Sir Martin!!!