What family does dysprosium belong to?
Lanthanides
Fact box
| Group | Lanthanides | Melting point |
|---|---|---|
| Period | 6 | Boiling point |
| Block | f | Density (g cm−3) |
| Atomic number | 66 | Relative atomic mass |
| State at 20°C | Solid | Key isotopes |
What is the origin of the name dysprosium?
Word origin: From dysprositos, which means “difficult to get at” in Greek. Discovery: Dysprosium was discovered in 1886 by French chemist Paul-Émile Lecoq de Boisbaudran, but he was not able to isolate it.
What is the classification of dysprosium?
lanthanide
Dysprosium is a chemical element with symbol Dy and atomic number 66. Classified as a lanthanide, Dysprosium is a solid at room temperature.
What is astatine element family?
Astatine is a member of the halogen family, elements in Group 17 (VIIA) of the periodic table. It is one of the rarest elements in the universe.
How common is dysprosium?
The abundance of dysprosium is 5.2 mg/kg in the Earth’s crust and 0.9 ng/L in sea water. Natural element 66 consists of a mixture of seven stable isotopes. The most abundant is Dy-154 (28%). Twenty-nine radioisotopes have been synthesized, plus there are at least 11 metastable isomers.
What is the main use of dysprosium?
Dysprosium is used in nuclear reactors as a cermet, a composite material made of ceramic and sintered metal, to make laser materials, nuclear reactor control rods, as sources of infrared radiation for studying chemical reactions.
How did Dale Corson Mackenzie and Emilio Segre discover the element astatine?
In 1940, three chemists named Dale R. Corson, Kenneth R. Mackenzie and Emilio Segre at the University of California found evidence for the existence of an unknown element at the end of whilst bombarding a bismuth isotope with alpha particles using a cyclotron.
Is dysprosium harmful to humans?
Soluble dysprosium salts, such as dysprosium chloride and dysprosium nitrate, are mildly toxic when ingested. The insoluble salts, however, are non-toxic. Based on the toxicity of dysprosium chloride to mice, it is estimated that the ingestion of 500 g or more could be fatal to a human.
What family does dysprosium come from?
Dysprosium. An element of the rare earth family that has the atomic symbol Dy, atomic number 66, and atomic weight 162.50. Dysprosium is a silvery metal used primarily in the form of various salts.
What is dysprosium used for?
Dysprosium is used in control rods for nuclear reactors because of its relatively high neutron-absorption cross section; its compounds have been used for making laser materials and phosphor activators, and in metal halide lamps.
Where is dysprosium found?
Dysprosium is never found in nature as the free element. Dysprosium is found in the ores monazite sand [(Ce, La, etc.)PO4] and bastn°site [(Ce, La, etc.)(CO3)F], ores containing small amounts of all the rare earth metals.
