Ytterbium, Yb, atomic number 70
General Ytterbium [ʏˈtɛrbiʊm] is a chemical element with the element symbol Yb and the atomic number 70. In the periodic table it is in the group of lanthanoids and is therefore also one of the rare earth metals. Ytterbium is named after its first location, the Ytterby mine near Stockholm, as are yttrium, terbium and erbium. Ytterbium (derived from [...]
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Thulium, Tm, atomic number 69
General Thulium is a chemical element with the element symbol Tm and the atomic number 69. In the periodic table it is in the group of lanthanoids and is therefore also one of the rare earth metals. Thulium (named after Thule, the mythical island on the edge of the world) was founded in 1879 by the Swedish chemist Per Teodor Cleve together with [...]
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Terbium, Tb, atomic number 65
General Terbium is a chemical element with the element symbol Tb and the atomic number 65. In the periodic table it is in the group of lanthanoids and is therefore also one of the rare earth metals. Terbium is named after its first location, the Ytterby mine near Stockholm, as are yttrium, ytterbium and erbium. The discovery of the element [...]
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Samarium, Sm, atomic number 62
General samarium (after the mineral samarskite, which in turn is named after the mining engineer WM Samarski) is a chemical element with the element symbol Sm and the atomic number 62. In the periodic table, the silvery element is in the group of lanthanides and is therefore also one of the metals of Rare Earth. To discover the samarium there are [...]
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Promethium, Pm, atomic number 61
General Promethium (from Prometheus, a titan of Greek mythology) is a chemical element with the element symbol Pm and the atomic number 61. In the periodic table it is in the group of lanthanoids and is therefore also one of the rare earth metals. All promethium isotopes are radioactive, which means that all atomic nuclei that contain 61 protons are unstable and [...]
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Neodymium, Nd, atomic number 60
General Neodymium (nomenclature recommendation was at times: Neodymium) is a chemical element with the element symbol Nd and the atomic number 60. In the periodic table it is in the group of lanthanides and is therefore also one of the rare earth metals. The element name is derived from the Greek words νέος neos for "new" and δίδυμος didymos for "twin" (as [...]
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Lutetium, Lu, atomic number 71
General Lutetium is a chemical element with the element symbol Lu and the atomic number 71. In the periodic table it is in the group of lanthanoids and is therefore also one of the rare earth metals. Lutetium was discovered in 1905 by three scientists independently of one another: Carl Auer von Welsbach, Charles James and the French Georges Urbain, who [...]
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Holmium, Ho, atomic number 67
General Holmium is a chemical element with the element symbol Ho and the atomic number 67. In the periodic table it is in the group of lanthanoids and is therefore also one of the rare earth metals. In 1878 the Swiss chemists Marc Delafontaine and Jacques-Louis Soret discovered the element spectroscopically through its deviating absorption lines. They called the new element [...]
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Gadolinium, Gd, atomic number 64
General Gadolinium is a chemical element with the element symbol Gd and the atomic number 64. In the periodic table it is in the group of lanthanoids and is therefore one of the rare earth metals. The first element of the ytter earth in the periodic table was found spectroscopically in 1880 by Jean Charles Galissard de Marignac in didymium and gadolinite. 1886 [...]
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Europium, Eu, ordinal 63
General Europium is a chemical element with the element symbol Eu and the atomic number 63. In the periodic table it is in the group of lanthanoids and is therefore also one of the rare earth metals. Besides americium, europium is the only element named after a continent. Americum, is an artificially produced. radioactive transuran of the actinides, which is used for [...]
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