Promethium - Periodic Table of Videos

[psychedelicintrigue]

地球の楽曲 ♫

Serenade Homepage

[wikieditspam]

Are there any Stabilized isotopes of Promethium? What's it's melting point? Flammable?

[zbrooo]

@wikieditspam Unfourtunatley you can't stabilise a radioactive isotope or influence it's half life significantly as far as we know because the protons and neutrons in the atoms nucleus are held together by a physical force which can't be influenced. According to wikipedia the melting point of promethium is 1042 °C and it slwoly tarnishes in the air but it burns readily at 150 °C to form promethium oxide. The longest lived isotope of promethium has a half life of 17.7 years.

[AutomatonGames]

I dont understand how you can get synthetic elements. Doesnt that mean there could be endless elements since there are so many combinations? Like Roegnthium or whatever, aka unununium, which isnt found in the natural world. Isnt that kinda the definition though? Can someone explain this to me?

[TheSmashFiles]

@AutomatonGames it isn't a combination of the properties of individual elements, it's a combination of the stuff in their nuclei; no matter what you'll have a specific number of protons. in concept you could combine three deuterium nuclei (one proton,one neutron) and get lithium, which would be identical to lithium formed from the combination of helium (two protons,two neutrons) and a single deuterium. the element is determined by the number of protons in its nucleus; nothing more, nothing less.

[AutomatonGames]

@TheSmashFiles Ok thanks! It all makes sence now!

[TheSmashFiles]

@AutomatonGames cheers, glad to be of help

[GDarkGoombaG]

@AutomatonGames k for this you have to understand nuclear strong force between nucleons (nucleons r protons and neutrons). theres gravity, electrical, strong and weak nuclear forces as four main forces. electrical force makes like charges repel. strong nuclear forces are what hold protons together. however, it decreases GREATLY with distance, and higher elements are so big that the force cant hold opposite sides together so the atom decays to a lower atom. the higher you go, CONT

[GDarkGoombaG]

@GDarkGoombaG the more nucleons you have, the more unstable it is, so it falls apart quicker. you could theoretically get a billion protons together with some amount of neutrons, but it would be REEAAAAAAALLLY short-lived. srry for abbreviations but i have to make messages fit comments. btw its roentgenium. copernicium is 112, and 118 is highest element known. uranium is highest natural element. and i dont remember electrical force's real name. btw check wikipedia for more.

[sockington1]

GREAT jammed again youtube sd crap

[WeaselWJ]

@sockington1 What?

[disorganizedorg]

Huh. Apparently Xenon used to be X rather than Xe.... and Hafnium was previously tentatively identified and called "Keltium", it appears.

A video on mistaken discoveries of elements might be fun...

[KarbineKyle]

Promethium-145 (Pm-145) is the most stable. It has a half-life of only 17.7 years, making it highly radioactive. In fact, Pm-147, which has an even shorter half-life of 2.6 years replaced luminous Radium-226 paint. Ra-226, has a half-life of 1602 years, but Pm-147 was used instead for a short time. Some watches, and even LAW rocket launcher sights are painted with Pm-147. Items with Pm-147 paint are very rare! Pm is the only unstable element including Technetium (Tc). Tc-98 is the most stable.

[Prstvlkkrtek]

@KarbineKyle It is still not wise to use Pm in paint; tritium is much less dangerous ; )

[minraja]

Dumb question..... If the element wasn't known then. How did he (the author) knew to make a space for it in his list of elements?

[mikedittsche]

@minraja

Because the author anticipated that there has to be an Element with the proton and electron configuration of Promethium even though he has not discovered it yet.

Many Elements have been anticipated in that way.

[minraja]

@mikedittsche Wouldn't that be like stating a theory as a fact before it is proven as a fact? Just because there is some evidence to suggest or anticipate something being there, doesn't mean it is there. Or am I jumping the gun on this?

Note: Not trying to start an argument. I just find it odd to be making space on the tables before proving the element exists as a fact first. Otherwise, how can research teams lay claim to discovering something that was already been discovered but not...cont

[minraja]

@minraja named yet x amount years/decades prior?

[minraja]

@minraja Really wish there was an edit button. I guess maybe the key word would be anticipated. Which is maybe why the scientist prior couldn't lay any claim on helping discover the element.

[mikedittsche]

@minraja

They have found plenty of elements that did fit the table.

The groups consist of elements of very similar behaviour.

They realized that certain elements had to be there but were not discovered yet.

The whole table was the best way to arrange the known elements even if it was not complete. It was accepted very fast because it is strikingly evident that this sort of arrangement is really useful.

[INVnubZ]

runescape right?



[porsche911sbs]

Quite a few elements are named after mythological figures.

Cadmium - Cadmus, Greek founder of Thebes

Cerium - Ceres, Roman goddess of agriculture (and a dwarf planet)

Helium - Helios, Greek Titan and deity of the Sun

Iridium - Iris, Greek god of rainbows (and an asteroid)

Mercury - Mercury, Roman god of trade (and a planet)

Neptunium - Neptune, Roman god of the sea (and a planet)

Palladium - Pallas, an epithet of Athena, Greek goddess of wisdom (and an asteroid)

[TeronGorefiendxxx]

@porsche911sbs you forgot vanadium which is called after vanadis (a name of Freyja)

[porsche911sbs]

Plutonium - Pluto, Roman god of the underworld (and a dwarf planet)

Promethium - Prometheus, Greek Titan and creator of mankind (and a moon of Saturn)

Selenium - Selene, Greek Titan and deity of the Moon

Tantalum - Tantalus, Greek ruler and inhabitant of Tartarus (and an asteroid)

Thorium - Thor, Norse god of thunder

Titanium - the Titans, a Greek race of deities (Titan also being a moon of Saturn)

Uranium - Uranus, Greek deity of the sky (and a planet)

[homousios]

This element could exemplfy all those at "Periodic Videos' you have undertaken the promethian task of metaphorically bringig fire to the youtube comunity as well as others the joys of chemistry

[cole3454657]

aha! when a woman has her period people think its blood coming out her vag but nein, it is not it is a non viscous red liquid known when promethium and sulfur produce the ionic compound known as promethium sulfide, aka "PmS" lolol

[SpaceTime4D]

@cole3454657 That's just sexually oriented and nonsensical.

Promethium doesn't occur in nature at all, let alone in one's body. Beside, the human body doesn't even use the rare earths anyway.

Next time you make science jokes, make sure you done the research behind them.

[cole3454657]

@SpaceTime4D thanks tips jesus christ its just a joke. no need for "research" its just a joke.

[MinGophers]

@SpaceTime4D Yeah man, chill out.

[KarbineKyle]

Sorry, Bismuth decays by Alpha particles (Helium Nuclei), it's synthetic isotopes decay by beta.

[KarbineKyle]

Awesome! I would like to own a small sample of Pm (metal form). Also, Rhenium is mostly stable in nature. Promethium is not. Nor is Technetium (Tc). Just several years ago, scientists found that Bismuth (Bi) has no stable isotopes, but it is still treated stable, even though it decays very slowly and is extremely weak by radioactive beta(-) decay. Very Interesting!

[Kulawendin]

Anthem

[Nerdylation]

did Promethium give fire to man?

[mmatheusc]

Prometheus did in Greek mythology

[ElveeKaye]

I like looking at those old textbooks!

[Kenzofeis]

Will there be a Periodic video of tables soon?

[onelasssttime]

LOL. Yes there will be a lecture at IKEA given by Martha Stewart.

[atomic7732]

What's THorium X isn't that Protactinium. I saw it in your book.