Astato
•
0 likes•992 views
Astatine is a radioactive chemical element that occurs on Earth only through the radioactive decay of heavier elements. It has no stable isotopes, with astatine-210 being the most stable isotope. Observed properties of astatine are consistent with it being a heavier analog of the element iodine.
Report
Share
Report
Share
Download to read offline
![85
Astato – Astatine
Mass: 210 u
[Xe] 4f14
5d10
6s2
6p5
Melting point: 575 K
Boiling point: 610 K
Density: kg/m3
Discovery: Dale R.
Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Astatine is a radioactive chemical element. It occurs on
Earth only as the result of the radioactive decay of certain
heavier elements. All of its isotopes are short-lived; the most
stable is astatine-210. The observed properties are consistent
with it being a heavier analog of iodine.](https://image.slidesharecdn.com/astato-130512053511-phpapp01/85/Astato-1-320.jpg)
Recommended
The Atom (2007)
The document summarizes the development of atomic models over time. It describes Dalton's billiard ball model of atoms as indivisible, hard spheres. Thomson's plum pudding model viewed atoms as a cloud of positive charge with electrons distributed throughout. Bohr modeled atoms as a small, positively charged nucleus surrounded by electrons in circular orbits, similar to the solar system. Later models such as Rutherford's and Schrodinger's provided a more accurate quantum mechanical description of atomic structure.
Purely particles - nothingnerdy IGCSE Physics
Rutherford's gold foil experiment led to the discovery of the nuclear model of the atom. When alpha particles were fired at a thin gold foil, most passed through but some were deflected or bounced straight back, which was unexpected. This led Rutherford to propose that the atom has a small, dense nucleus containing its positive charge and most of its mass, with empty space around it. Nuclear fission was later discovered, where the nucleus of an unstable atom splits into smaller nuclei, releasing energy. Nuclear fission reactors use this process to generate energy on a large scale.
Fauna ibérica
El documento describe varias especies de fauna ibérica que se encuentran en peligro de extinción, incluyendo el lince ibérico, el oso pardo, el lobo ibérico, la foca monje, la ballena azul, el águila imperial, la nutria y el quebrantahuesos. Proporciona detalles sobre sus características físicas, hábitats y dietas.
Business advantages of IP Telephony
IP Telephony allows for voice calls to be transmitted over data networks using open standards rather than traditional telephone networks, enabling businesses to consolidate their data and voice networks onto a single infrastructure. This provides benefits such as lower telecommunications costs, simplified network management as sites no longer need dedicated voice systems, and increased worker productivity and collaboration enabled by centralized applications that can be accessed remotely.
El astato
El documento describe las características del elemento químico astato. El astato es un elemento radiactivo y el más pesado de los halógenos. Se forma a partir de la degradación de uranio y torio. Tiene una vida media muy corta y no hay compuestos comercialmente importantes. El astato junto con el francio son los elementos más raros de la naturaleza. Fue sintetizado por primera vez en 1940 por tres científicos en la Universidad de Berkeley.
Astato
Este documento describe las propiedades de los halógenos, en particular el flúor. Explica que el flúor es el halógeno más reactivo y electronegativo. Se encuentra de forma natural en la corteza terrestre y se obtiene comercialmente mediante electrólisis. El flúor es un oligoelemento necesario para los seres humanos pero en exceso puede causar fluorosis dental. Se utiliza en diversas aplicaciones industriales como la fabricación de teflón y semiconductores.
Hidruros No Metalicos
El documento clasifica los hidruros no metálicos en cinco grupos: a) térreos, b) carbonoideos, c) nitrogenoideos, d) anfígenos y e) halógenos. Proporciona el nombre comercial, la fórmula sistemática tradicional y la fórmula química de varios hidruros como ejemplos de cada grupo.
Isaac newton
Isaac Newton was an English scientist born in 1643 who made fundamental contributions to physics, mathematics, and optics. He developed the laws of motion and universal gravitation, which dominated the scientific view of the physical universe for the next three centuries. Newton also invented calculus and made advances in optics, compiling a set of principles of reflection, refraction, and color. Newton served as a member of Parliament and published his seminal work Philosophiae Naturalis Principia Mathematica, establishing classical mechanics.
Recommended
The Atom (2007)
The document summarizes the development of atomic models over time. It describes Dalton's billiard ball model of atoms as indivisible, hard spheres. Thomson's plum pudding model viewed atoms as a cloud of positive charge with electrons distributed throughout. Bohr modeled atoms as a small, positively charged nucleus surrounded by electrons in circular orbits, similar to the solar system. Later models such as Rutherford's and Schrodinger's provided a more accurate quantum mechanical description of atomic structure.
Purely particles - nothingnerdy IGCSE Physics
Rutherford's gold foil experiment led to the discovery of the nuclear model of the atom. When alpha particles were fired at a thin gold foil, most passed through but some were deflected or bounced straight back, which was unexpected. This led Rutherford to propose that the atom has a small, dense nucleus containing its positive charge and most of its mass, with empty space around it. Nuclear fission was later discovered, where the nucleus of an unstable atom splits into smaller nuclei, releasing energy. Nuclear fission reactors use this process to generate energy on a large scale.
Fauna ibérica
El documento describe varias especies de fauna ibérica que se encuentran en peligro de extinción, incluyendo el lince ibérico, el oso pardo, el lobo ibérico, la foca monje, la ballena azul, el águila imperial, la nutria y el quebrantahuesos. Proporciona detalles sobre sus características físicas, hábitats y dietas.
Business advantages of IP Telephony
IP Telephony allows for voice calls to be transmitted over data networks using open standards rather than traditional telephone networks, enabling businesses to consolidate their data and voice networks onto a single infrastructure. This provides benefits such as lower telecommunications costs, simplified network management as sites no longer need dedicated voice systems, and increased worker productivity and collaboration enabled by centralized applications that can be accessed remotely.
El astato
El documento describe las características del elemento químico astato. El astato es un elemento radiactivo y el más pesado de los halógenos. Se forma a partir de la degradación de uranio y torio. Tiene una vida media muy corta y no hay compuestos comercialmente importantes. El astato junto con el francio son los elementos más raros de la naturaleza. Fue sintetizado por primera vez en 1940 por tres científicos en la Universidad de Berkeley.
Astato
Este documento describe las propiedades de los halógenos, en particular el flúor. Explica que el flúor es el halógeno más reactivo y electronegativo. Se encuentra de forma natural en la corteza terrestre y se obtiene comercialmente mediante electrólisis. El flúor es un oligoelemento necesario para los seres humanos pero en exceso puede causar fluorosis dental. Se utiliza en diversas aplicaciones industriales como la fabricación de teflón y semiconductores.
Hidruros No Metalicos
El documento clasifica los hidruros no metálicos en cinco grupos: a) térreos, b) carbonoideos, c) nitrogenoideos, d) anfígenos y e) halógenos. Proporciona el nombre comercial, la fórmula sistemática tradicional y la fórmula química de varios hidruros como ejemplos de cada grupo.
Isaac newton
Isaac Newton was an English scientist born in 1643 who made fundamental contributions to physics, mathematics, and optics. He developed the laws of motion and universal gravitation, which dominated the scientific view of the physical universe for the next three centuries. Newton also invented calculus and made advances in optics, compiling a set of principles of reflection, refraction, and color. Newton served as a member of Parliament and published his seminal work Philosophiae Naturalis Principia Mathematica, establishing classical mechanics.
Satélites Geoestacionario
Los satélites geoestacionarios orbitan la Tierra a una altura de aproximadamente 35,930 km, lo que les permite dar una vuelta completa cada 24 horas y permanecer fijos sobre un punto de la superficie terrestre. El documento calcula esta altura aplicando la segunda ley de Newton y la fórmula para la velocidad orbital, sustituyendo los valores conocidos de la masa de la Tierra, su radio y el periodo orbital de 24 horas.
La luz segundo eso
La luz es energía que se propaga en forma de ondas electromagnéticas y puede viajar a través del vacío. Se propaga en línea recta a una velocidad de 300,000 km/s. Las fuentes de luz incluyen cuerpos calientes, reacciones químicas y estrellas. La luz blanca está compuesta por la mezcla de colores del arco iris y los objetos reflejan o absorben diferentes colores, determinando su apariencia.
Chemical reaction activities
This document contains a series of chemistry activities and problems for students involving chemical reactions and stoichiometry. The activities explore the differences between physical and chemical changes, conservation of mass, moles, molecules, atoms and balanced chemical equations. Students are tasked with identifying reaction types, balancing equations, calculating moles, masses and volumes of substances involved in various chemical reactions. Key concepts covered include the mole concept, the law of conservation of mass, the law of definite proportions, and stoichiometric calculations.
Lista segundo bac
O documento lista as notas finais de vários alunos no exame final de Física 2o Bachillerato. A maioria dos alunos teve notas entre 3 e 9, com alguns reprovados ou que precisam fazer todo o exame novamente. Dois alunos se saíram particularmente bem com notas acima de 8.
Examen fisica moderna soluciones
Este documento presenta las soluciones a varios problemas de física relacionados con la física nuclear y la relatividad. En la primera sección se calcula el trabajo de extracción y la longitud de onda umbral para la emisión de electrones de potasio iluminado con luz amarilla de sodio. La segunda sección calcula la constante de desintegración, el número de núcleos y la actividad de una muestra radioactiva inicial y después de un año. La tercera sección calcula el tiempo dilatado y la distancia recorrida por una nave
Neón javier rodriguez moscatel
Neon is a noble gas with an atomic mass of 20.18. It was discovered in 1898 by William Ramsay and Morris Travers. Neon has a melting point of -248.6°C and a boiling point of -246°C. It has a density of 0.89994 kg/m3 and is lighter than helium with a cooling power per unit volume 40 times higher than liquid helium and 3 times greater than liquid hydrogen, making it cheaper than helium for most applications using liquid gases.
Estaño javier rodriguez moscatel
Tin is a chemical element with symbol Sn and atomic number 50. It has two possible oxidation states of +2 and the more stable +4. Tin is the 49th most abundant element and has 10 stable isotopes, more than any other element on the periodic table. It was discovered in 1854 by Julius Pelegrin and has a melting point of 231.9°C and a boiling point of 2,603°C.
Plutonio javier rodriguez moscatel
Plutonium is a radioactive transuranic element with an atomic number of 94. It is an actinide metal that has a silver-gray appearance which darkens when exposed to air. Plutonium exhibits six allotropic states and four oxidation states, and reacts with carbon, halogens, nitrogen and silicon.
Seaborgio
Element 106, seaborgium, has an electron configuration of [Rn] 5f14 6d4 7s2 and a predicted density of 35 g·cm−3. It was first synthesized in 1974 by bombarding a target of californium-249 with oxygen-18 ions, producing seaborgium-263 which decays by alpha emission with a half-life of 0.9 seconds, with its discovery reported by scientists at the Joint Institute for Nuclear Research in Dubna, USSR and the Lawrence Berkeley Laboratory.
Osmio
Osmium is a hard, bluish-white transition metal that is the densest naturally occurring element with a density of 22.59 g/cm3. It melts at 3306 K and boils at 5285 K. Osmium is typically found in nature as an alloy in platinum ores and its alloys with other platinum group metals are used for applications requiring extreme hardness and durability like fountain pen tips and electrical contacts.
Gadolinio
Gadolinium is a silvery-white, malleable and ductile rare-earth metal with a melting point of 1585 K and boiling point of 3546 K. It has an electron configuration of [Xe] 4f7 5d1 6s2 and density of 7.90 g·cm−3. Gadolinium was first detected spectroscopically in 1880 by de Marignac and was isolated in 1886, making it one of the last rare-earth elements to be discovered.
Cromo javier rodriguez moscatel
Chromium is a chemical element with an atomic number of 24 that was discovered by Johann Gottlob Lehmann. It is a transition metal that is hard, brittle, and gray in color. Chromium has a high resistance to corrosion.
Ununoctio javier rodriguez moscatel
Ununoctium (Uuo) is a synthetic element with atomic number 118, atomic mass of 244.06, and chemical symbol Uuo. It is predicted to be a solid with a boiling point of 320°C and density of 13.65 kg/m3. Robert Smola czukń is credited with discovering the element through experiments conducted at the Joint Institute for Nuclear Research.
Titatnium
Titanium is a transition metal with the symbol Ti that has a low density and silver color. It has a melting point of 1941 K and boiling point of 3560 K. Titanium is found in many minerals deposits like rutile and ilmenite that are widely distributed in the Earth's crust and lithosphere, and it is also found in living things, rocks, water, and soil.
Magnesio
Magnesium is the fourth most common element in the Earth, making up 13% of the planet's mass and a large fraction of the mantle. It has an atomic mass of 24.3247u, a melting point of 923K, and a boiling point of 1363K. Magnesium has a common oxidation state of +2, is an alkaline earth metal, and the third most abundant dissolved element in seawater due to its high solubility.
Disprosio
Dysprosium is a rare earth element with a metallic, bright silver luster. It is soft enough to be cut with a knife and can be machined without sparking if overheating is avoided. Dysprosium's physical characteristics can be greatly affected even by small amounts of impurities.
Bromo
Bromine is a red-brown, corrosive and toxic liquid that was isolated in 1825-1826 by two chemists. It has properties between chlorine and iodine and is part of the halogen group with an atomic number of 35. While rare in the Earth's crust, bromine accumulates in oceans and is commercially extracted from brine pools, with over 556,000 tonnes produced globally in 2007.
Francio
Francium is a highly radioactive alkali metal that was discovered in 1939 and is the second least abundant element in nature. It has only one electron in its valence shell like other alkali metals and decays into astatine, radium, and radon. Francium has a melting point of 300K and boiling point of 950K with a density of 1870 kg/m3, but there are no commercial applications due to its scarcity and instability, being only used for research in biology and atomic structure.
More Related Content
More from jvprofe
Satélites Geoestacionario
Los satélites geoestacionarios orbitan la Tierra a una altura de aproximadamente 35,930 km, lo que les permite dar una vuelta completa cada 24 horas y permanecer fijos sobre un punto de la superficie terrestre. El documento calcula esta altura aplicando la segunda ley de Newton y la fórmula para la velocidad orbital, sustituyendo los valores conocidos de la masa de la Tierra, su radio y el periodo orbital de 24 horas.
La luz segundo eso
La luz es energía que se propaga en forma de ondas electromagnéticas y puede viajar a través del vacío. Se propaga en línea recta a una velocidad de 300,000 km/s. Las fuentes de luz incluyen cuerpos calientes, reacciones químicas y estrellas. La luz blanca está compuesta por la mezcla de colores del arco iris y los objetos reflejan o absorben diferentes colores, determinando su apariencia.
Chemical reaction activities
This document contains a series of chemistry activities and problems for students involving chemical reactions and stoichiometry. The activities explore the differences between physical and chemical changes, conservation of mass, moles, molecules, atoms and balanced chemical equations. Students are tasked with identifying reaction types, balancing equations, calculating moles, masses and volumes of substances involved in various chemical reactions. Key concepts covered include the mole concept, the law of conservation of mass, the law of definite proportions, and stoichiometric calculations.
Lista segundo bac
O documento lista as notas finais de vários alunos no exame final de Física 2o Bachillerato. A maioria dos alunos teve notas entre 3 e 9, com alguns reprovados ou que precisam fazer todo o exame novamente. Dois alunos se saíram particularmente bem com notas acima de 8.
Examen fisica moderna soluciones
Este documento presenta las soluciones a varios problemas de física relacionados con la física nuclear y la relatividad. En la primera sección se calcula el trabajo de extracción y la longitud de onda umbral para la emisión de electrones de potasio iluminado con luz amarilla de sodio. La segunda sección calcula la constante de desintegración, el número de núcleos y la actividad de una muestra radioactiva inicial y después de un año. La tercera sección calcula el tiempo dilatado y la distancia recorrida por una nave
Neón javier rodriguez moscatel
Neon is a noble gas with an atomic mass of 20.18. It was discovered in 1898 by William Ramsay and Morris Travers. Neon has a melting point of -248.6°C and a boiling point of -246°C. It has a density of 0.89994 kg/m3 and is lighter than helium with a cooling power per unit volume 40 times higher than liquid helium and 3 times greater than liquid hydrogen, making it cheaper than helium for most applications using liquid gases.
Estaño javier rodriguez moscatel
Tin is a chemical element with symbol Sn and atomic number 50. It has two possible oxidation states of +2 and the more stable +4. Tin is the 49th most abundant element and has 10 stable isotopes, more than any other element on the periodic table. It was discovered in 1854 by Julius Pelegrin and has a melting point of 231.9°C and a boiling point of 2,603°C.
Plutonio javier rodriguez moscatel
Plutonium is a radioactive transuranic element with an atomic number of 94. It is an actinide metal that has a silver-gray appearance which darkens when exposed to air. Plutonium exhibits six allotropic states and four oxidation states, and reacts with carbon, halogens, nitrogen and silicon.
Seaborgio
Element 106, seaborgium, has an electron configuration of [Rn] 5f14 6d4 7s2 and a predicted density of 35 g·cm−3. It was first synthesized in 1974 by bombarding a target of californium-249 with oxygen-18 ions, producing seaborgium-263 which decays by alpha emission with a half-life of 0.9 seconds, with its discovery reported by scientists at the Joint Institute for Nuclear Research in Dubna, USSR and the Lawrence Berkeley Laboratory.
Osmio
Osmium is a hard, bluish-white transition metal that is the densest naturally occurring element with a density of 22.59 g/cm3. It melts at 3306 K and boils at 5285 K. Osmium is typically found in nature as an alloy in platinum ores and its alloys with other platinum group metals are used for applications requiring extreme hardness and durability like fountain pen tips and electrical contacts.
Gadolinio
Gadolinium is a silvery-white, malleable and ductile rare-earth metal with a melting point of 1585 K and boiling point of 3546 K. It has an electron configuration of [Xe] 4f7 5d1 6s2 and density of 7.90 g·cm−3. Gadolinium was first detected spectroscopically in 1880 by de Marignac and was isolated in 1886, making it one of the last rare-earth elements to be discovered.
Cromo javier rodriguez moscatel
Chromium is a chemical element with an atomic number of 24 that was discovered by Johann Gottlob Lehmann. It is a transition metal that is hard, brittle, and gray in color. Chromium has a high resistance to corrosion.
Ununoctio javier rodriguez moscatel
Ununoctium (Uuo) is a synthetic element with atomic number 118, atomic mass of 244.06, and chemical symbol Uuo. It is predicted to be a solid with a boiling point of 320°C and density of 13.65 kg/m3. Robert Smola czukń is credited with discovering the element through experiments conducted at the Joint Institute for Nuclear Research.
Titatnium
Titanium is a transition metal with the symbol Ti that has a low density and silver color. It has a melting point of 1941 K and boiling point of 3560 K. Titanium is found in many minerals deposits like rutile and ilmenite that are widely distributed in the Earth's crust and lithosphere, and it is also found in living things, rocks, water, and soil.
Magnesio
Magnesium is the fourth most common element in the Earth, making up 13% of the planet's mass and a large fraction of the mantle. It has an atomic mass of 24.3247u, a melting point of 923K, and a boiling point of 1363K. Magnesium has a common oxidation state of +2, is an alkaline earth metal, and the third most abundant dissolved element in seawater due to its high solubility.
Disprosio
Dysprosium is a rare earth element with a metallic, bright silver luster. It is soft enough to be cut with a knife and can be machined without sparking if overheating is avoided. Dysprosium's physical characteristics can be greatly affected even by small amounts of impurities.
Bromo
Bromine is a red-brown, corrosive and toxic liquid that was isolated in 1825-1826 by two chemists. It has properties between chlorine and iodine and is part of the halogen group with an atomic number of 35. While rare in the Earth's crust, bromine accumulates in oceans and is commercially extracted from brine pools, with over 556,000 tonnes produced globally in 2007.
Francio
Francium is a highly radioactive alkali metal that was discovered in 1939 and is the second least abundant element in nature. It has only one electron in its valence shell like other alkali metals and decays into astatine, radium, and radon. Francium has a melting point of 300K and boiling point of 950K with a density of 1870 kg/m3, but there are no commercial applications due to its scarcity and instability, being only used for research in biology and atomic structure.
More from jvprofe (20)
Astato
- 1. 85 Astato – Astatine Mass: 210 u [Xe] 4f14 5d10 6s2 6p5 Melting point: 575 K Boiling point: 610 K Density: kg/m3 Discovery: Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940) Astatine is a radioactive chemical element. It occurs on Earth only as the result of the radioactive decay of certain heavier elements. All of its isotopes are short-lived; the most stable is astatine-210. The observed properties are consistent with it being a heavier analog of iodine.