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It is composed of the first known rare-earth element, yttrium. [14] [7] [15] [16] Examining a different sample, Anders Gustaf Ekeberg confirmed the existence of a new "earth", calling it "yttria" and the source mineral "ytterbite". [7] The mineral that Arrhenius discovered and Gadolin and Ekeberg analyzed was eventually renamed gadolinite in ...
Johan Gadolin was born in Åbo (Finnish name Turku), Finland (then a part of Sweden). [ 2 ] [ 3 ] Johan was the son of Jakob Gadolin , professor of physics and theology at Åbo. [ 4 ] Johan began to study mathematics at the Royal Academy of Turku ( Åbo Kungliga Akademi ) when he was fifteen.
Yttrium is a chemical element; it has symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element". [8] Yttrium is almost always found in combination with lanthanide elements in rare-earth minerals and is never found in nature as a free ...
Ytterby is the single richest source of elemental discoveries in the world; the chemical elements yttrium (Y), terbium (Tb), erbium (Er), and ytterbium (Yb) are all named after Ytterby, and five more elements were also first discovered there. Local roads connect Ytterby to county road 274 and hence the mainland.
James Andrew Harris (March 26, 1932 – December 12, 2000) was an American radiochemist who was involved in the discovery of elements 104 and 105 (rutherfordium and dubnium, respectively). Harris was the head of the Heavy Isotopes Production Group, part of the Nuclear Chemistry Division of the University of California, Berkeley .
May 18 – David Deutsch, Israeli-born quantum physicist. August 16 – David Spiegelhalter, English statistician. December 1 – Victor Ambros, American developmental biologist, recipient of the Nobel Prize in Physiology or Medicine. Debra Fischer, American astronomer; Pat Nuttall, British virologist and acarologist.
Natural yttrium (39 Y) is composed of a single isotope yttrium-89. The most stable radioisotopes are 88 Y, which has a half-life of 106.6 days, and 91 Y, with a half-life of 58.51 days. All the other isotopes have half-lives of less than a day, except 87 Y, which has a half-life of 79.8 hours, and 90 Y, with 64 hours.
He discovered the element holmium in 1879 by examining a sample of erbium oxide. [3] [8] While removing impurities from a sample of erbium oxide, Cleve discovered a brown substance and a green substance, and the brown substance was holmium oxide (the green substance was thulium oxide). [8] [9] However, this sample may have been impure. [10]