As it is found in the 16th group so, it is a p – block element. For more information on how to create your own plugin or have it listed, learn more here. The electron configuration for selenium is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 4. It can exist in two forms; as a silvery metal or a red powder. Stop taking selenium and call your doctor at once if you have: Most people can get their RDA of selenium from food. By object in turn can be used with various locator strategies such as ID, Name, Class Name, XPATH etc. Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. Selenium toxicity is often caused by over-supplementation and can impact the human body in a number of ways. Selenium Atomic Number and Electronic Configuration, Atomic number of selenium is 34. Group Number: 16. It is a nonmetal element with the atomic number 34. We’ll work with you to get you set up to contribute. Thus, it is a semiconductor. although its key isotope is 80Se. Selenium is a non metallic chemical element exists in several allotropic forms, although three are generally recognized. 34 Se Selenium 78.971. Managed IT Services in Toronto. Out of seven naturally occurring isotopes, 5 are stable and two are unstable. It is widely used in glassmaking and pigmentation. It shows similar properties as sulfur, tellurium, and arsenic. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Selenium was discovered and isolated by Swedish Chemists Jons Jacob Berzelius and Johann Gottlieb Gahn in 1817. Optical Properties – Selenium conducts some amount of electricity. The active treatment in all trials was selenium capsules (200 μg per day in two trials and 256 μg per day in one trial). In chemical activity and physical properties it resembles sulfur and tellurium. Selenium occurs in minerals such as eucairite (CuAgSe), crooksite (CuThSe) and clausthalite (PbSe), but these minerals are too rare to use as a major source of selenium. As it is found in the 16th group so, it is a p – block element. Organoselenium compounds are used in vulcanization of rubber. Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … It has been found in research that its conductivity increases in presence of light which means its photoconductivity increases as the intensity of light increases. The number of participants included in the trials ranged from 40–70 and the trials lasted from three to six months. This property has made selenium useful in devices that respond to the intensity of light, such as electric eyes, photo cells, light meters for cameras and copiers. Some symptoms are more severe than others, but all represent a disruption in wellness. ’ which means moon. It is a nonmetal (more rarely considered a metalloid ) with properties that are intermediate between the elements above and below in the periodic table , sulfur and tellurium , and also has similarities to arsenic . Selenium Group. For commercial use selenium is mostly produced as a byproduct of refining of metal sulfide ores. Selenium (Se) Atomic Data for Selenium (Se) Atomic Number = 34 Atomic Weight = 78.96 Reference E95 Arsenic is found at the left of selenium in the 4th period and 15th group. Arsenic is found at the left of selenium in the 4th period and 15. group. Pro Lite, Vedantu Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … Selenium is a chemical element which is placed in the 16th group and 4th period in the periodic table. Properties: Selenium has an atomic radius of 117 pm, a melting point of 220.5°C, boiling point of 685°C, with oxidation states of 6, 4, and -2. Se. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. It has 2 electrons in K – shell, 8 electrons in L – shell, 18 electrons in M – shell and 6 electrons in its outermost shell N. Physical and Chemical Properties of Selenium are Listed Below, It has many isotopes. This ends our coverage on the topic “Selenium”. It can change light energy into electrical energy. Selenium can also produce electricity directly from sunlight and is used in solar cells. This trace element is even involved in DNA synthesis. WebElement elementName = driver.findElement(By.LocatorStrategy("LocatorValue")); Selenium burns in air and is uneffected by water, but dissolve… It is generally found in metal sulfide ores. We aim to make a company in the country which will make each and every product in the country rather importing. Electronic Configuration of Group 17 Elements, Electronic Configuration of the d-Block Elements, An Introduction to Atomic Number, Isotopes and Isobars, Difference Between Atomic Mass and Atomic Weight, Chemical Properties of Metals and Nonmetals, Benzene - Physical and Chemical Properties, Vedantu Selenium is a non-metal and can be compared chemically to its other non-metal counterparts found in Group … 628 Hofstadter Road, Suite 6Newport News, VA 23606, Thomas Jefferson National Accelerator Facility is managed by, Jefferson Science Associates, LLC for the U.S. Department of Energy. Today, most selenium is obtained as a byproduct of refining copper. Sorry!, This page is not available for now to bookmark. Sulfur is placed above selenium and tellurium is placed below selenium in the 16, group of the periodic table. 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