Yttrium - Video Learning - WizScience.com
"Yttrium" is a chemical element with
symbol "Y" and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and it has often been classified as a "rare earth element". Yttrium is almost always found combined with the lanthanides in rare earth minerals and is never found in nature as a free element. Its only stable isotope, 89 Y, is also its only naturally occurring isotope.
In 1787,
Carl Axel Arrhenius found a new mineral near
Ytterby in
Sweden and named it "ytterbite", after the village.
Johan Gadolin discovered yttrium's oxide in Arrhenius' sample in 1789, and
Anders Gustaf Ekeberg named the new oxide "yttria".
Elemental yttrium was first isolated in 1828 by
Friedrich Wöhler.
The most important use of yttrium is in making phosphors, particularly the red phosphors used in television set cathode ray tube displays and in
LEDs. It is also used in the production of electrodes, electrolytes, electronic filters, lasers and superconductors; various medical applications; and the tracing of various materials to enhance their properties. Yttrium has no known biological role, and exposure to yttrium compounds can cause lung disease in humans.
Yttrium is a soft, silver-metallic, lustrous and highly crystalline transition metal in group 3. As expected by periodic trends, it is less electronegative than its predecessor in the group, scandium, and less electronegative than the next member of period 5, zirconium; additionally, it is of comparable electronegativity to its successor in its group, lutetium, due to the lanthanide contraction. Yttrium is the first d-block element in the fifth period.
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Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK.
Background Music:
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This video uses material/images from https://en.wikipedia.org/wiki/Yttrium, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.