Changes to the Periodic Table - Periodic Table of Videos

[therealjammit]

This video has finally answered my question if frozen D2O will sink in liquid H2O.

[2DP71828182845904523]

Thanks for these wonderful videos!

[Spieleschummler]

Why the heck do I got spanish subtitles? Nevermind... me gusta!

[CertifiedBad4ss]

I laughed hard when he burst out "Is nothing sacred!?" at 0:28, about the periodic table changing.



[baalisgod666]

I bet he has had that hair do since the invention of the Periodic Table.

[drewnickel]

why is it some atoms have two naturally stable isotopes, but some have only radioactive isotopes?

[masluxx]

and i learned something new today. Ty)

[arbonac]

I dig the dew.

[Trapmaker677]

i might go here someday and study :D

[Debbie321lopez]

Who of all of you, masters the Youtube channel and the Commentary?

[Ndizzyinthehizzy]

Thank you guys for making these videos, watching these videos helped me pass my chemistry final.

[imnotabear]

I'm worried about his guy, he seems to have early signs of parkinsons and I believe it can be treated/controlled but not by conventional medicine.

[Probewitch]

I have a large new autographed nucleide chart on my wall, but without your video's I'd still be clueless.

Thanks.

[lambogeek]

the professor makes some good jokes!

[smk2k2]

Didn't they find that the mass of the proton was 4% less as well? Has that been accounted for?

[sajibaby1]

oh thanks for keeping us up to date!!!!!!

[pepsibookcat]

That was a GREAT question you interjected at 3:12!

I wonder about the differences in isotopes of elements sampled and analyzed on other planets, comets, etc.

[periodicvideos]

@pepsibookcat thanks... don't often get comments about my questions! ;)

[boiledcabbage06]

I HAVE ONE OF THOSE CUPS :D I won it in my chem class last year <3

[ProfWithTheHair]

@giantsquidrule Thank you for letting us know. When we started the project, I gave an interview on the BBC Russia service.

[giantsquidrule]

They just showed a few of your clips on Kultura channel in Russia.

[l3oss2u]

I can imagine now solving a problem saying like find the enthalpy change for compound X from element derived from China from volcano X.

[Heartbreakhotel112]

Nice cup..!

[InnocuousAssassin]

Why Scientists have long messy hair?

[BanderHM]

@InnocuousAssassin no time to take care of it... i guess ;)

[meteorman96]

I want that periodic table tea mug

[Intervene]

Nice update!!!

[crusiatusblack]

Interesting video, I must say, this change is quite logical.

[Necron3211]

In the thumbnail I thought the Professor was wearing a Santa hat, but it was just his hair..... :3

[JonatanGronoset]

I wanan eat that yellow stuff, it looks delicious! D:

[jeebersjumpincryst]

heavy stuff.... :)

[tszailer]

it is very interesting that an international committee - not having enough to do - comes up with these changes. Do you remember, when the basis for atomic weight was carbon? Do you remember,that the enthalpy of elements are set to zero? Our world is relative, IUPAC cannot change that - but they try. This is a meaningless tweak on the periodic table. Poor professor had to be PC in this video and do not say it's bullcr@p...

[MuneoPollen]

@tszailer The basis for atomic weight is *still* carbon, one particular isotope of carbon (12). It may be a minor tweak but acknowledging and listing the ranges that atomic isotope distributions may have across the earth is just another part of the accurate measures that are needed in every part of science.

[MrTechGuy1995]

This is just another case of a scientist justifying their existence so they get paid, just like the deal with pluto.

[MrTechGuy1995]

Wow What is this liberal nonsence? Just leave the periodic table as it is, Damn its fine!

[rathat48]

@MrTechGuy1995 If it was fine, they wouldn't have to change it.

[blackjackel2]

I was wondering, why is there a Hydrogen on 7B? Is that "more into" the chemistry study or is it the "new implemented" one?

(I havent seen that Hydrogen on any P.T. that I've used/seen before)

[s4m5on]

whyd the sound quality get so low when you were asked why the weight would be different from volcano a compared to crystal b

[periodicvideos]

@s4m5on because the person asking the question (me) is not wearing a microphone, whereas The Professor is!

[Darkonomist]

5 years of high school chemistry... in the recycle bin!

[GuavaJ3nny]

@Darkonomist lol if memorization of atomic weights was the only thing you gained from 5 years of chemistry then I think those five years belong in the recycling bin anyways.

[tuvoca]

@Darkonomist LOL!

[Oheeeoh]

Sounds like a good opportunity to pick up an older version on the cheap!

[o2me2]

Great video. Thumbs up. Thank you.

[culwin]

Your ties are now useless. Send them to me.

[holsson85]

For carbon, the 12-13 ratio in limestone is different then oil-shale even when depositet in the same ocean. Limestone has the same ratio as the water it's formed in while "organic" biomatter take up more of one of the isotopes (I forgot which one, lol)

[trespire]

Congratulations on an excelently presented video. Very clear, a pleasure to watch.

If only other interviewers (in news media) would ask knowlegably "intelligent" questions like Bradies' question/input, and then allow the interviewe the time to reply, then perhaps the public might become more informed about the subject being discussed. But maybe thats expecting too much from the general public.

[FiliPinoy95]

i'm jealous of anyone who has him as a teacher.. if i had this guy as my chemistry teacher then i would come to class EVERYDAY

[ShortGuy1792]

Good luck updating the periodic table engraved on your hair. :P

[periodicvideos]

@ShortGuy1792 ha ha... nice one!

[PEA1222]

Why is there hydrogen at 2 spots and not 1 like the other elements?

[Smokinsomebasil]

@PEA1222 it doesn't really fit perfectly into any position, so it's put in different places on different periodic tables, and in some it's put in two positions

[Pada007gangster]

The head of IUPAC lives and works in my city (Guelph, Ontario)... if i get to meet him.. I have a LOT of questions for him.

[koffypr]

Great Video like always . If only I had money to study in Nottingham :s

[OpiatedBliss]

Isnt science the exact opposite of sacred??? lol

[MarkArandjus]

Well, I've been vindicated. Ever since elementary school I've said that memorizing the periodic table JUST BECAUSE wouldn't be of much use, and right I was :P

[defect530]

you scientist are always changing thing's. next you're going to say that Pluto not a planet.....oh wait.

[h2ophilter]

God is sacred....psht just kidding!

[LizzyAston]

Sulphur.

[grandexandi]

IS NOTHING SACRED?!

[bobster451]

@grandexandi No, nothing is sacred.

That is except the scientific method, which is sacred.

[puncheex]

@Xerotaerg: That would seem to be difficult as the light elements are being churned out in older stars all the time, and the heavy ones when those old stars finally explode. Percentages of isotopes presumably hang upon exact temperatures, element mixtures present, pressures, timings and so on

[cwbh10]

I got a A on my chem test :D Thanks!

[ghuegel]

This could really get out of hand. Do other elements' isotopic distributions vary like this? Are there elements where there are five or six sources with different weights? The periodic table could become really massive if overly conscientious people have the run of things...

[SprodeBoy]

I am a sophomore (10th grade) and am interested in going to nottingham. How does it work for americans going? like how much is tuition?

[periodicvideos]

@SprodeBoy the main periodicvideos website has a link to all about studying chemistry at the university (bottom right of site)... check it out! there are certainly Americans who study here!

[Cheejyg]

can anybody give me a link to the video @ 1:04 i want to fidn out about heavy water

[periodicvideos]

@Cheejyg it's on as an annotation, or just search heavy water periodic table of videos

[Cheejyg]

@periodicvideos haha i got tired of waiting for a reply and i did a search lol, i didn't see the annotationg just now :P

but thanks! =) now i know about heavy water aka D2O!! ^_^

[BasherCoon]

Zinc! aka 30th

[canadafreakazoid]

It could be shown that all elements have isotopes, except for the new ones and the Uu series

[puncheex]

@canadafreakazoid: It must be interesting when your equipment not only determines, but actually creates the average atomic weight for an element throughout the known universe.

[onthecuttingedge2005]

first off, the gravitation on the earth is different at different locations on earth, it also depends where those measurements are taken. gravity is not the same around the world.

[Tinteskou]

Seriously how do you get so many things with periodic tables on?

They're full-on awesome, I want some :(

[puncheex]

@Tinteskou: Oh, there's a niche market for them, but the Prof has people all over the world scouring it for periodic tables. That's the upside of being a world celebrity, even if it's only within the chemistry geeks that like these videos. Make sure you see his birthday video this year.

[Ormaaj]

Heh this is kind of stupid. Elements of the same isotope don't have some additional magic property which causes variation in atomic weight do they? If not, then periodic tables should explicitly state an atomic weight for a specific isotope (maybe the most common found in the earth's crust or atmosphere.) An average isn't very useful and neither is a range because neither is a range unless you're for some reason interested in those numbers as said near the end of the video.

[puncheex]

@Ormaaj: Bull. The average is quite useful when doing precise reactions, trying to determine yields, when you are trying to figure out how much is a mole of sulfur, exactly. With a range, at least it becomes explicit that you need to assay your sulfur. I imagine that high-purity chemicals will begin to have assays of their weights printed on the labels in the future.

[Ormaaj]

@puncheex The problem with giving an average is similar to false precision except a precise value is still actually known for each isotope, but a precise value for the average doesn't have a strong significance. A range is slightly better in that it gives precise values only where meaningful but still requires that you understand exactly what that means.

[puncheex]

@Ormaaj: I don't argue with you over that. I only say that your statement above of "An average isn't very useful and neither is a range...". The average is closer, much closer, than just using a single "most-common isotope" number. The range let's you know how big your error bars are. They are meaningful, but if your experiment requires absolute precision then you're going to have to assay your supplies yourself.

[solarmaximumkade]

He cant even have tea without it having something to do with Chemistry :L

[puncheex]

@solarmaximumkade: I was wondering why he was demonstrating with that cup in his hand. I don't think he'd do anything that gauche in his classes.

[Cickarn]

Does there is water in the mug?!

[Patrickssj6]

I call lobbying! They clearly want to increase the periodic table printing economy :P

[525047]

The different isotopes change reactions in the case that some elements are heavier and so harder to move. Harder to move means they react last. And the isotopes are created by our star and its various ejections. Different stages of our star have created diverse concentrations of isotopes. You probably shouldn't have averaged them to begin with.

[30LayersOfKevlar]

*dramatisation*

-Time for another experiment !

/pours green liquid into blue one/

/it starts to fuzz and produce smoke/

-My calculations ! They are all...wrong !

/Explosion/

*curtain !*

[TheSpankymonkey]

Errrm excuse me *puts his hands up. Could someone please ask me before going off on a tangent and changing things..... Thank you.

[johncrwarner]

The atomic weights are not as sacred as all that - it would be different if they moved elements LOL

[puncheex]

@johncrwarner: Did you see the video where they determined what the arrangements would be if they had 172 elements, and started filling in electrons in the t shells? The table starts getting weird.

[johncrwarner]

@puncheex

The Pekka Pyykkö paper from the Chemistry Department of the University of Helsinki. The filling of the g shell electrons makes it much wider and the big question is the relative energy levels of the various shells - but it is still quite orderly.

[TomMarAlem1987]

The range of distribution of different isotopes of the same element may change depending upon which sample you analyze; does, however, the Universal distribution change?

How to determine the Universal distribution, or is that not necessary since distribution fluctuates depending upon which sample you analyze?

[imafirinmalaser]

I want that mug, I want that tie and I want that hair cut!

[BecuzIt]

Man the prof really is so excited in this vid that he got me excited for this too

[rageagainstthebath]

@periodicvideos Brady, you ought to link all those other videos that are mentioned here (deuterium, sulfur etc) , so the viewers could easily find them. Thanks!

[afhdfh]

Love your video, love your cup, Professor!

[DrSaxxy]

First Pluto and now the Periodic Table.. is nothing sacred?!?  lol

[shizamura]

@DrSaxxy That only means we're always learning :)

[solarmaximumkade]

@DrSaxxy Oh please, Pluto should Never have been a main planet ;)

[puncheex]

@solarmaximumkade: Yeah, if only those people back in 1930 knew what you know, eh? :)

[solarmaximumkade]

@puncheex No need to get arsey.

Take it up with Clyde Tombaugh :)

[puncheex]

@DrSaxxy: It makes you wonder how physicists felt back in 1905 when Einstein was saying the Newton was wrong. Can you imagine?

[berniebay]

@DrSaxxy

It's a Kuiper belt object!

[alphatelescopii]

@DrSaxxy science always changes :P

[DevilMaster]

@DrSaxxy If something was sacred, it wouldn't be science.

[jakeweiq]

Prof.'s hair periodic table definitely a KEEPER!

[asasinator17]

I have some AS chemistry exams in June and January, and for these exams we will be given a periodic table in a data booklet, does this mean the table we will be given will have changed?

Also how would I apply the new weights to calculations? would you just take the middle value of the range or is some other technique needed?

[Cube3Productions]

@asasinator17 No it will not be changed, i have my A level chemistry exam next year as well. most of the time, we only use the relative atomic mass to one decimal place.

[asasinator17]

@Cube3Productions Thank you :) does anyone have any information on my other question though? about how to use a range of value's for a calculation instead of one definitive value?

[ghuegel]

@asasinator17 In most cases, you could just pick one. Unless you need extreme precision, it doesn't matter much whether you have 10.66 g or 10.67 g of a substance.

The difference between the values for Li is ~1%, but the other ranges are much smaller, on the order of 0.1% or 0.01%. So not much difference.

[MinGophers]

Lithium.

[frosti0]

hydrogen! aka first :P

[Cheeseboat20]

@frosti0

Sorry, you were lithium.

Better luck next time

[StaupEimer]

Wonderful video. I've heard of some studying on this done in my hometown at the University of Calgary.