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Periodic Table Turns 150 Years Old (economist.com)
The Economist tells the story of how French chemist Antoine-Laurent de Lavoisier came to publish the first putatively comprehensive list of chemical elements -- substances incapable of being broken down by chemical reactions into other substances -- known today as the periodic table. It was Lavoisier and his wife Marie-Anne who pioneered the technique of measuring quantitatively what went into and came out of a chemical reaction, as a way of getting to the heart of what such a reaction really is. "Where the story of the periodic table of the elements really starts is debatable," reports The Economist, "but Lavoisier's laboratory is as good a place as any to begin..." Here's an excerpt from the report: Lavoisier's list of elements, published in 1789, five years before his execution, had 33 entries. Of those, 23 -- a fifth of the total now recognized -- have stood the test of time. Some, like gold, iron and sulphur, had been known since ancient days. Others, like manganese, molybdenum and tungsten, were recent discoveries. What the list did not have was a structure. It was, avant la lettre, a stamp collection. But the album was missing.
Creating that album, filling it and understanding why it is the way it is took a century and a half. It is now, though, a familiar feature of every high-school science laboratory. Its rows and columns of rectangles, each containing a one- or two-letter abbreviation of the name of an element, together with its sequential atomic number, represent an order and underlying structure to the universe that would have astonished Lavoisier. It is little exaggeration to say that almost everything in modern science is connected, usually at only one or two removes, to the periodic table.
Creating that album, filling it and understanding why it is the way it is took a century and a half. It is now, though, a familiar feature of every high-school science laboratory. Its rows and columns of rectangles, each containing a one- or two-letter abbreviation of the name of an element, together with its sequential atomic number, represent an order and underlying structure to the universe that would have astonished Lavoisier. It is little exaggeration to say that almost everything in modern science is connected, usually at only one or two removes, to the periodic table.
no this is the list of things to try smoking, much like the way a purity test is used.
in Russia, and then republished in Germany the next year. The "table" of Lavoisier was a much simpler affair, which was pretty far from what a "periodic table" is. It had "elements" in it like "fire", "light", "caloric" and complex molecules.
But let's forget the science and go for the propaganda.
Russia's government is a bad actor. The same person or small cabal has been in charge for 4-5 terms. That's not healthy even if they do fake a vote, your apology makes no difference. You're a traitor to democracy.
Happy Birthdayium!
Table-ized A.I.
Sure, the "moron" debunked the wildly popular phlogiston theory and discovered hydrogen and oxygen. He put chemistry on its way to uncovering the nature of specific gravity with his focus on weights and gases, at a time when one was unorthodox and the other virtually unknown.
He did all of this prior to America becoming a nation, before anything faster than a horse carriage was available to share ideas over land.
But sure, he's a "moron" according to people like who know nothing of history or science.
Mendeleev's work was a stitching together of a lot of people's works. I haven't read him directly but I believe IIRC he did and is famous for mentioning that. https://en.wikipedia.org/wiki/History_of_the_periodic_table
The story of the discovery of the elements, as briefly described in TFA is a fascinating one and I want more. What books on this subject can you recommend?
So it is more like a one time table then?
can be found here
at ground zero but real TV "news" wont report it.
And you lot have complex compound forces as particles....yeh HE was the blind idiot. YOUR quasi particles are the real deal.
Antoine-Laurent de Lavoisier's contribution, would Mendeleev have laid out his initial periodic table, or done something different/not at all.
As others remind, it is all about stepping on the shoulders of giants. And it is surprising how something as simple as documenting some scientific data and putting it on a paper for visual reference could elude some members of the scientific community back in the days when paper was expensive and space consuming, compared to today when disk, monitor space, and reorganization of data are cheap and plentiful.
https://www.youtube.com/watch?v=zGM-wSKFBpo
can be found here
Slashdot, fix the reply notifications... You won't get away with it...
What's with al the news about tables?
Tables are the root of all evil!
After 150 years, you would think they could finally stop calling it "The Periodic Table" and finally make it "The Permanent Table".
But seriously, it's amazing that The Periodic Table has lasted for so long when you consider how very few elements had been known back then and how so many more have either been discovered or created since then. Yet, the 150-year-old Periodic Table has still held up. There are alternative forms of representing the table of the elements, but so far none has been as successful as The Periodic Table.
It was the German doctor Mengeleev who discovered the periodic table. Unfortunately, a lot of innocent humans were sacrificed during the research, so it's the French and the Russians that get the limelight these days.
Escher was the first MC and Giger invented the HR department.
Or as our glorious founder always said back in his time, "lying press!" (seriously, look up it's origins.)
Do you really believe the media telling you it's that old? The scientsts just promote it to keep their jobs and get rich! It probably isn't older than the 70s when that Physicist Jimmy Carter was pushing his science to indoctrinate our children.
The execution of Lavoisier set the progress of chemistry back by decades.
Lavoisier publsihed his table of the known elements and sorted them in categories: gases, metals, nonmetals, "earths"
In 1829 Döbereiner found "Triads" of elements (like Li, Na, K) which behaved similarly, and where the "middle" element (when ordered by atomic weight) was almost the average of the first and third.
By 1843 Gmelin had identified ten triads plus several groups of dour and five elenments.
In 1862 de Chancourtois published a spiral of elements ordered by atomic weight and noticed similarities in similar distances. His work was ignored because he used geological terms.
In 1864 Lothar Meyer published a table, in which he gave precedence of "valence" instead of atomic weight. He also predicted an element with atomic weight 73 "between" Si and Sn - the later found Germanium. At the same time Oding published a table ordererd by atomic weight and noticed peridicities.
1863 to 1866 Newlands published a series of papers in which he noticed "octaves" in the elements when ordered by atomic weight.
1869/70 Mendeleev and Meyer nearly at the same time published the modern form of the PSE. Meyers was an expanded form of his 1864 table, while Mendeleevs was - as far as I can determine - more rigorous in having free places etc.
Avter the discovery of the atomic nucleus Moseley determined the positive charge of the nucleus and that the PSE ordered the elements by increaing charge.
The modern layout was proposed by Deming in 1923.
Its documentaries but mvgroup.org has some really good ones about the history of the table.
True. Yet the periodic table was an invention of Mendeleev and no one else.
Mendeleev Table was and is the only working one. Mosley was the one who explained why (the periodicity was there not due to mass, but to nuclear charges ; Mayer did not get that, simply grouping the mass values, and Mendeleev got that by using his chemical knowledge, actually swapping some elements order, like potassium and argon, and leaving the blanks in the table for then-unknown elements like technetium).
Modern form of the table (long rows) has some debatable advantages over the original one (short rows); the later is still taught in Russian speaking countries and is useful, again, for chemical knowledge (tell me maximal valence of a transition metal from Dempsey table?).
The rest was bunk, octaves of some crazy Brit and four magical elements, of some ancient Greeks. it wasn't remotely useful.
Dempsey --- Deming, blame autocorrect
There are a couple of spots in the table where the molar weight DECREASES for a subsequent element in the table. The concept of atomic number ordering came later when protons were discovered.
Your link may shows that it happens, but that says nowt one way nor t'other on his claim about it not being healthy.
Your logical fallacy is ignoratio elenchi. On top of that, tha can fuck reyt off.
Confucius say, "Find worm in apple - bad. Find half a worm - worse."
Antimony, arsenic, aluminum, selenium...
The Disappearing Spoon is a good read
horror vacui