what year was beryllium discovered?
140318
It was discovered by Louis Vauquelin in 1798.
330709
The use of uranium, in its natural oxide form, dates back to at least AD 79, when it was used to add a yellow colour to ceramic glazes (yellow glass with 1% uranium oxide was found near Naples, Italy). When this was rediscovered, in the earlier part of the 19th century, the world’s only known source of uranium 'earths' were the old Hapsburg silver mines in Joachimsthal, Bohemia, and the local glassmaking industry kept a tight lid on the secret ingredient and its supply as long as it could.\n\nThe discovery of the element is credited to the German chemist Martin Heinrich Klaproth who in 1789 found uranium in a mineral called pitchblende. It was named after Uranus the planet , which had been discovered eight years earlier by William Herschel. It was first isolated as a metal in 1841 by Eugene-Melchior Peligot. In 1850 the first commercial use of Uranium in glass was developed by Lloyd & Summerfield of Birmingham, England. Uranium was found to be radioactive by French physicist Henri Becquerel in 1896, who first discovered the process of radioactivity with uranium minerals.
782015
The MOST recently discovered element was atomic number 118.  It is being temporarily called 'ununoctium'.  As to WHEN it was discovered... that's a little more complicated.\n\nA team of element-makers at Lawrence Berkeley lab claimed to have made it in 1999, but when nobody could reproduce the find with the lab's methods (even the original lab), their finding was discredited.\n\nIn Spring of 2002 (it took four months) the Joint Institude of Nuclear Research in Dubna claimed to have produced an atom of ununoctium.  This was confirmed by Dubna and the Berkeley lab when each of them produced another atom in 2005.\n\nThe average lifespan of these three atoms was just under a thousandth of a second.  So don't expect any accumulation of the stuff!
74991
Marie Curie discovered Radium and polonium.She deduced that there were other substances besides uranium that were very radioactive, such as polonium and radium, which she discovered in 1898. Raduim was used to cure tumors in cancer patients and the process to using radium to cure malign tumors is called Curietherapy .
518331
Helium is a basic element, atomic weight 2. It's a noble gas. Because it's a basic element, it can't be broken down into anything else besides what it is.\n\nHelium, the second most abundant element in the universe, was discovered on the sun before it was found on the earth. Pierre-Jules-César Janssen, a French astronomer, noticed a yellow line in the sun's spectrum while studying a total solar eclipse in 1868. Sir Norman Lockyer, an English astronomer, realized that this line, with a wavelength of 587.49 nanometers, could not be produced by any element known at the time. It was hypothesized that a new element on the sun was responsible for this mysterious yellow emission. This unknown element was named helium by Lockyer.
237460
May 10, 1954\n\nhttp://www.britannica.com/eb/article-9343590?tocId=9343590
25359
Probably gold was one of the first elements "discovered". However, copper as well has been known since prehistoric times. Iron has been known since prehistoric times, as has zinc, silver, tin, lead and mercury. Where these were discovered first, and by who, is not clear. However, there are clearly a lot of contenders for the "first element", if one wants to choose among these. \n\nIf one looks for more modern discoveries, then these are better documented (look at the attached reference). Some early contenders are listed below:\n\nCobalt was discovered by Swedish Chemist Georg Brandt in 1735. \n\nCavendish found hydrogen in 1766.  \n\nJoseph Black of Scotland found magnesium was a separate element in 1755. \n\nNickel was found by Swedish metallurgist Axel-Frederik Cronstedt in 1751. \n\nDaniel Rutherford discovered nitrogen in 1772. \n\nCarl-Wilhelm Scheele in 1771 discovered oxygen is an element in Sweden. \n\nGerman merchant and alchemist Hennig Brand found phosphorus in 1669.\n\nOf the modern elements,  phosphorus appears to be the first found, in Germany.
829227
Not sure you can get an exact ranking, because three were researched simultaneously:\n\nHelium was discovered on Earth in 1895 by Scottish chemist Sir William Ramsay, though some credit the discovery of helium (in the sun's spectrum) to Janssen and Lockyear in 1868. Ramsay discovered most of the remaining noble gases--argon in 1894 (with Lord Rayleigh) and krypton, neon, and xenon in 1898 (with Morris M. Travers). Radon was discovered in 1898 by Fredrich Ernst Dorn.
539694
A whole lot, in 1889 we still didnt have power everywhere. This year the first long distance power lines were run. Einstein hadn't been born yet. Since 1889 some big discoveries were:\n1898- Marie Curie discovered the concept of radioactivity\n1905- Einstein published a paper on special relativity\n1912- Einstein formulated General relativity\n1913- Bohr discovered that electrons orbit around a nucleus in the atom\n1924- Galaxies discovered outside Milky Way\n1926- Quantum Mechanics first formulated\n1927- Heisenberg uncertainty principle\n1929- Discovered Universe is expanding\n1942-1946- Atomic bomb created\n\nThat is just a short list of the many many discoveries we have had since 1889. I hope that helped
2825
Most of the elements have been either discovered by scientists or created by scientists.  Only a choice few have been known since antiquity -- usually ones that are found in their elemental state in nature or are easy to isolate from compounds (usually ores).  These are iron, copper, tin, lead, silver, gold, and mercury.  \n\nSome of the elements were discovered by people you might not consider scientists.  For example, Albertus Magnus was the first to isolate arsenic.  He was a theologian and philosopher in the 13th century, but also researched alchemy, long before true "scientific" methods were established -- would you count arsenic as being discovered by a scientist?  It's kind of a gray area.
612990
At the bottom of the perodic table...\n\nThey are technetium (at. no. 43), which was the first element to be synthesized, promethium (at. no. 61), astatine (at. no. 85), francium (at. no. 87), and the transuranium elements (at. no. 93 and beyond in the periodic table). Some of these elements have since been shown to exist in minute amounts in nature, usually as short-lived members of natural radioactive decay series (see radioactivity).\n\nThe synthetic elements through at. no. 100 (fermium) are created by bombarding a heavy element, such as uranium or plutonium, with neutrons or alpha particles. The synthesis of the transfermium elements (elements with at. no. 101 or greater) is accomplished by the fusion of the nuclei of two lighter elements. Elements 101 through 106 were first produced by fusing the nuclei of slightly lighter elements, such as californium, with those of light elements, such as carbon. Elements 107 through 112 were first produced by fusing the nuclei of medium-weight elements, such as bismuth or lead, with those of other medium-weight elements, such as iron, nickel, or zinc. Element 114 was first produced by fusing the nuclei of plutonium and calcium and subsequently by fusing the nuclei of lead and krypton, as was element 116. Element 115 was produced by bombarding americium with calcium, and element 113 resulted from the radioactive decay of element 115. The claim by Lawrence Berkeley National Laboratory to have created element 118 has been retracted.)\n\nThe transfermium elements are produced in very small quantities (one atom at a time), and identification is therefore very difficult because of half-lives ranging from minutes to milliseconds and the need to identify the products by methods other than known chemical separations. This has led to controversy over reported discoveries and over the naming of the elements. It has been predicted that one isotope of element 114—containing 114 protons and 184 neutrons—would be very stable because its nucleus would have a full complement of protons and neutrons. Termed an “island of stability,” its half-life might be measured in years. However, none of the three isotopes of element 114 synthesized as yet have as many as 184 neutrons, and their half-lives are still in the millisecond range.
221042
Well, helium has 2 protons always, so it'd make a beryllium atom. I'll need more information (like what isotopes of helium) in order to tell you the exact isotope of beryllium it'll make.
322877
Rutherford's Discovery of Alpha Scattering\nI. The French Start First\n\nIn 1900, the Curies and Becquerel were studying radioactivity (Rutherford was in Canada, having just recently moved to McGill University in Montreal. He will return to England, but not for several years.) and they had occasion to determine if the alpha rays traveled in a straight line. Becquerel carried out the work.\n\nHe took some polonium (discovered by Pierre and Marie Curie) and made it into a straight line source, not the usual pencil of rays. He then used this long, narrow beam of alpha rays to make a photograph of a wire. He found that the shadows had sharp edges, even when the alpha rays had gone through a thin film of aluminum.\n\nMarie Curie gave the interpretation of the experiment. She said that this showed that the alpha particles were not scattered, that is, able to be bent from their path. Alpha rays traveled in nice, straight lines ALL THE TIME.\n\nThey were wrong.\n\nWe jump to 1903 and Rutherford announces he has succeeded in bending alpha particles with a magnetic (and an electrical) field. Becquerel, using his different techniques, checks and confirms Rutherford's results.\n\nWhat Becquerel does is aim his radioactive source (radium, now as well as polonium) at a narrow slit with a photographic plate on the other side. Of course, with no magnetic field, he gets a nice, crisp image of the narrow slit, directly in line with the radium source.\n\nWhen he turned on the magnetic field, he got Rutherford's result, that is, the alpha particles bent in the magnetic field.\n\nPart b of the figure shows the offset of the image on the photographic plate. It is not lined up directly with the open slit, labeled Y.\n\nBecquerel also reversed the magentic field's direction during the exposure and got a double image.\n\nThe images were exactly the same distance from the center and the edges of the traces ALWAYS were sharp and crisp.\n\nUp to this point, there was zero evidence of alpha particle scattering.\n\nII. Now, the evidence starts to accumulate\n\nThe work described above was all done in the early part of 1903 and it was in June of 1903 that Becquerel made the first observation that led to alpha particle scattering.\n\nHe noticed, right at the end of his experiments, that the images from the doubled set (when he reversed the magnetic field during the experiment) moved closer together as he moved the photographic plate away from the slit (that is, increased the length b in the diagram above).\n\nIt seemed that the radius of curvature of the alpha particles path through the slit Y increased as b increased, thereby moving the two images closer together.\n\nNow, Becquerel knew this equation:\n\nRH = v (M/E)\n\nR = the radius of curvature, H = the magnetic field strength, v is the velocity, and E/M is the charge-to-mass ratio of the alpha particle. (I know, I know, this equation just came out of nowhere. You'll have to trust me on this one, since I don't know how to derive the equation either.)\n\nWhat Becquerel did is assume E is constant, so this left him with the unpleasant thought that either v or M had to increase. Since it is very had to visualize the alpha particle SPEEDING UP as it traveled from its source, Bequerel decided that M must increase, that the alpha particle picked up stray matter as it traveled along.\n\nHe could not have liked it, but there wasn't anything else he could think of. Since Rutherford was busy with other work, he did not take up any checking on Becquerel's results. However, one Rutherford result will have bearing on scattering. Rutherford found (in July 1905) that the alpha particle decreased in velocity, until at about 6,000 miles per second, it would not make its presence known by ionizing gases or darkening a photographic plate.\n\nIII. We're getting there\n\nThe importance of the slowing down of the alpha particle meant that R (the radius of the curvature in a magnetic field)
617590
Carl Wilhelm Scheele discovered it in 1772, and Joseph Priestly found it in 1774 (independently).  Scheele was a Swede, Priestly was an Englishman.
896371
It is now called Roentgenium 111. Look it up in any search engine.
445826
some heavy materials emits the rays in spontaneously this is called radioactivity. this is accidentally found by Henry Becquerel
831018
http://www.chemicalelements.com/elements/be.html\n\nthis website may help you!!!!!! ( hope you get an A)