selenium group number

It is a nonmetal element with the atomic number 34. Specializing in Law Firm & Private Wealth Management Industries. . Write your own or install one that someone else has already written. Say what? Overexposure of selenium may cause bronchitis, asthma, vomiting, lungs dysfunction, diarrhea, abdominal pain, shortness of breath and in severe cases death. Symbol of the selenium element is Se. Symbol of the selenium element is Se. Today, most selenium is obtained as a byproduct of refining copper. Selenium conducts some amount of electricity. Jons Jacob Berzelius and isolated by Johann Gottlieb Gahn, 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4 or [Ar] 3d10 4s2 4p4. It a company of type: Non-distributing corporation with 50 or fewer shareholders. In fact, the enzymes that convert the thyroid hormone thyroxine (T4) to triiodothyronine (T3) are selenium-dependent (Shreenath, 2019). 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. It is found as solid at 20 ℃ temperature. Selenium was discovered and isolated by Swedish Chemists Jons Jacob Berzelius and Johann Gottlieb Gahn in 1817. It is a soft metalloid similar to sulfur, unaffected by water and soluble in alkalis and nitric acid. Element number 34, selenium, was discovered by Swedish chemist Jons Jacob Berzelius in 1817. Originally believing the material was tellurium, Berzelius eventually realized that it was actually a previously unknown element. It is combined with the physical properties of elements like tellurium and sulfur. Selenium is also a photoconductor. Selenium was discovered by Jöns Jacob Berzelius, a Swedish chemist, in 1817 after analyzing an impurity that was contaminating the sulfuric acid (H2SO4) being produced at a particular factory in Sweden. In selenium, the first energy level has two electrons in sub-shell s. 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. It is a nonmetal element with the atomic number 34. The Selenium Group Inc. is governed under the Canada Business Corporations Act - 2010-01-26. Atomic number of selenium is 34. In one investigation, 10 groups of selenium-replete subjects were randomly assigned to receive a placebo or either 200 or 600 mcg/day selenium as selenomethionine, sodium selenite, or high-selenium yeast (in which an estimated 75% of selenium was in the form of selenomethionine) for 16 weeks . WebElement elementName = driver.findElement(By.LocatorStrategy("LocatorValue")); It is used in thin – film solar cells of copper indium gallium selenide. The control group in all trials was made up of participants on placebo capsules. Atomic Weight: 78.96. It is used in flat panel x – ray detectors. Some symptoms are more severe than others, but all represent a disruption in wellness. 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. Thus, it is a semiconductor. Although after research it has been said that all these effects of selenium deficiency are generally accompanied with deficiency of other vitamins or other diseases. The electron configuration for selenium is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 4. Selenium is a non metallic chemical element exists in several allotropic forms, although three are generally recognized. From the Greek word for the moon, selene. 600-2000 messages in 60 min. These are the main commercial uses of selenium in today’s world. Selenium may cause cataracts, damage to liver tissues, respiratory problems etc. The brighter the light, the better selenium conducts electricity. This is a group of company. Selenium is a non-metal and can be compared chemically to its other non-metal counterparts found in Group … For commercial use selenium is mostly produced as a byproduct of refining of metal sulfide ores. Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. The word selenium is derived from the Greek word ‘. Selenium is also a photoconductor. It is used in photocells as it is a photoconductor. Apart from these it has many synthetic isotopes as well, although all of its synthetic isotopes are unstable in nature. 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. They have the same number of valence electrons and the only elements Selenium is related to is Sulfur and Tellurium. Now a days, the selenium compound (selenium sulfide) is widely used for the treatment of dandruff. Selenium is a chemical element which is placed in the 16th group and 4 th period in the periodic table. Selenium Se Element 34 Mass Number: 79 Atomic weight: 78.97 g/mol Atomic number (Z): 34 Electrons: 34 Protons: 34 Neutrons: 45 Period: 4 Group: 16 Block: p Selenium is pronounced as si-LEE-nee-em. Selenium is more in common with Sulfur because they are in the same group. Stop taking selenium and call your doctor at once if you have: Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … It works as an antifungal agent. In chemical activity and physical properties it resembles sulfur and tellurium. Selenium (Se) is in period 4 and group 16 (VI) so it has 6 electrons in it's outer energy level which is energy level n = 4. It shows similar properties as sulfur, tellurium, and arsenic. Selenium is certainly a team effort! Re: [selenium-users] Using XPath wildcards in attributes in Selenium IDE: kadambari saran: 12/13/20: Not able to invoke microsoft edge canary on MAC: lucky: 12/13/20: Is it possible to run Selenium Webdriver with Custom Browser built on WKWebView? It is generally found in metal sulfide ores. This ends our coverage on the topic “Selenium”. Se-77 and Se-78 are used for the production of the therapeutic radioisotope Br-77. 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 . Vedantu academic counsellor will be calling you shortly for your Online Counselling session. 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. Managed IT Services in Toronto. Below is the syntax of FindElement command in Selenium web driver. Group Name: Chalcogen. Selenium is a non metallic chemical element, member of the group XVI of the periodic table. Thus, it is a semiconductor. Selenium appearsin a number of allotropic forms: the most popular are a red amorphous powder, a red crystalline material, and a gray crystalline metallike form called metallic selenium. Optical Properties – Selenium conducts some amount of electricity. Offering 20% off your current IT fees. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. It can change light energy into electrical energy. A relationship between the first three members of the group was recognized as early as This configuration is also written as [Ar] 4s 2 3d 10 4p 4, according to Dr. Anne Marie Helmenstine, a contributor to About.com. 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. 116. Selenium is a chemical element with symbol Se and atomic number 34. Its electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4 or it can be written as [Ar] 3d10 4s2 4p4. Selenium is a chemical element which is placed in the 16th group and 4th period in the periodic table. Selenium's resistance to the flow of electricity is greatly affected by the amount of light shining on it. What's in a name? Estimated Crustal Abundance: 5×10-2 milligrams per kilogram, Estimated Oceanic Abundance: 2×10-4 milligrams per liter, Number of Stable Isotopes: 6 (View all isotope data). Selenium is a chemical element with the symbol Se and atomic number 34. Selenium was discovered and isolated by Swedish Chemists Jons Jacob Berzelius and Johann Gottlieb Gahn in 1817. They can introduce new commands to the IDE or integrate with a third-party service. Selenium is an essential trace element, but its high concentrations are harmful for the environment. Phase at Room Temperature: Solid. Specializing in Law Firm & Private Wealth Management Industries. Its 5 isotopes are stable which are 74Se, 76Se, 77Se, 78Se, 80Se. Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.. Long term use of high selenium doses can lead to dangerous side effects. Symbol of the selenium element is Se. Pro Lite, Vedantu Group Number: 16. Atomic Weight: 78.971. Selenium enters the environment as selenium dioxide through combustion of coal and oils. Relative atomic weight of selenium is 78.96. By object in turn can be used with various locator strategies such as ID, Name, Class Name, XPATH etc. In chemical activity and physical properties it resembles sulfur and tellurium. There are several ways you can help out, whether you’re a programmer, designer, QA engineer, writer, project manager, or just willing to help. Selenium: Atomic number: 34: Atomic mass [amu] 78.96: Atomic mass [pm] 120: Density at STP [g/cm3] 4.819: Number of protons: 34: Number of neutrons (typical isotopes) 74; 76; 77; 78; 80: Number of electrons: 34: Electron configuration [Ar] 3d10 4s2 4p4: Oxidation states +4,6/-2: Electron affinity [kJ/mol] 195: Electronegativity [Pauling scale] 2.55: First ionization energy [eV] 9.7524 Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. Atomic Number: 34. Such as in brasses selenium is used in place of lead which is more toxic than selenium. Pro Lite, Vedantu By object in turn can be used with various locator strategies such as ID, Name, Class Name, XPATH etc. WebElement elementName = driver.findElement(By.LocatorStrategy("LocatorValue")); Out of seven naturally occurring isotopes, 5 are stable and two are unstable. This last form conducts electricity better in the light than in the dark and is used in photocells. Selenium is a non-metal and can be compared chemically to its other non-metal counterparts found in Group … For questions about this page, please contact Steve Gagnon. 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 forms few inorganic compounds, none of which are commercially important. Sulfur is placed above selenium and tellurium is placed below selenium in the 16, group of the periodic table. Selenium burns in air and is uneffected by water, but dissolve… In the past selenium used to dominate the electronics market as it is a semiconductor but presently silicon has almost replaced selenium. Period Number: 4. The word selenium is derived from the Greek word ‘selene’ which means moon. High concentration of selenium in fishes may cause swelling of gills and blood flow within the gills. If that isn’t enough to convince you it’s worthy of having its own fan group, selenium is also crucial for reproduction and protects against infection. By doing so, you will be able to access free PDFs of NCERT Solutions as well as Revision notes, Mock Tests and much more. Name of family that selenium belongs to? Offering 20% off your current IT fees. The international Lake Koocanusa Monitoring and Research Working Group started studying selenium contamination six years ago after Montana Fish, Wildlife & Parks found selenium levels were increasing in seven species of fish in the lake between 2008 and 2013. As it is found in the 16th group so, it is a p – block element. This trace element is even involved in DNA synthesis. We’ll work with you to get you set up to contribute. Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. Selenium can be extended through the use of plugins. In addition to its use in electrical devices, selenium is also used to make a ruby-red color in glasses and enamels, as a photographic toner and as an additive to stainless steel. It is rarely found as pure ore or in pure elemental form. It shows similar properties as sulfur, tellurium, and arsenic. 34 Se (Selenium) Flashcard of Selenium. Its electronic configuration is 1s. It can change light energy into electrical energy. Element Classification: Non-metal. Managed IT Services in Toronto. It is often found in combination with metals like mercury, copper, silver or lead. The amount of selenium in these products will vary, but you can typically get up to 40 mcg per 1 cup serving of noodles or cereal, and about 16 mcg from 2 slices of whole grain toast. Se-74 is used for the production of Se-75 which is used as a source in gamma radiography. For more information on how to create your own plugin or have it listed, learn more here. Selenium can also produce electricity directly from sunlight and is used in solar cells. Selenium deficiency may cause Kashin – beck disease, stress, low functioning of brain, white muscle disease in ruminants, dysfunction of thyroid gland etc. Melting Point: 493.65 K (220.5°C or 428.9°F), Density: 4.809 grams per cubic centimeter. ’ which means moon. As it is found in the 16th group so, it is a p – block element. It is used in copper alloys as well. Selenium is a metallic main group element, found in Group VIb of the periodic table. The chalcogens (/ ˈ k æ l k ə dʒ ɪ n z /) are the chemical elements in group 16 of the periodic table.This group is also known as the oxygen family.It consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and the radioactive element polonium (Po). Selenium is used in various fields mainly due to its properties such as photoconductivity, semiconductor of electricity etc. 311 likes. It is rarely found as pure ore or in pure elemental form. Organoselenium compounds are used in vulcanization of rubber. Due to its various properties sometimes, it is considered as a metalloid as well. Although its deficiency may also cause many adverse effects on health. Selenium is a chemical element that is placed in the oxygen group of the periodic table. It is used in fluorescent quantum dot and surge protectors. Melting Point: 493.65 K (220.5°C or 428.9°F) Boiling Point: 958 K (685°C or 1265°F) Density: 4.809 grams per cubic centimeter. Relative atomic mass: 78.971 (8) Selenium was discovered by Jöns Jacob Berzelius (SE) in 1817. Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … Arsenic is found at the left of selenium in the 4th period and 15. group. Some symptoms are more severe than others, but all represent a disruption in wellness. Selenium is found as red, grey and black allotropes of it. Few of its uses are listed below –. Oxygen group element, any of the six chemical elements making up Group 16 (VIa) of the periodic classification—namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv). Properties of selenium: Name of Element : Selenium Symbol of Element : Se Atomic Number of Selenium : 34 Atomic Mass: 78.96 amu Its 7 isotopes are available in nature. The amount of selenium in these products will vary, but you can typically get up to 40 mcg per 1 cup serving of noodles or cereal, and about 16 mcg from 2 slices of whole grain toast. Its 5 isotopes are stable which are. Here are a number of plugins created and maintained by third parties. It is a component of many enzymes such as thioredoxin reductase, deiodinase enzymes. For commercial use selenium is mostly produced as a byproduct of refining of metal sulfide ores. Selenium IDE can be extended through the use of plugins. 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