600-2000 messages in 60 min. What is Selenium? Selenium Group. Its electronic configuration is 1s. Here are a number of plugins created and maintained by third parties. Its 7 isotopes are available in nature. It is a nonmetal element with the atomic number 34. For more information on how to create your own plugin or have it listed, learn more here. Element Name: Selenium. 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). Symbol of the selenium element is Se. Selenium is a non-metal and can be compared chemically to its other non-metal counterparts found in Group … 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. Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. According to Pauling scale, its electronegativity is 2.55. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. 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). It shows similar properties as sulfur, tellurium, and arsenic. Some symptoms are more severe than others, but all represent a disruption in wellness. Sulfur is placed above selenium and tellurium is placed below selenium in the 16, group of the periodic table. 311 likes. Selenium is a non metallic chemical element exists in several allotropic forms, although three are generally recognized. 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. It is widely used in glassmaking and pigmentation. Symbol of the selenium element is Se. There are five sub-shells, but only four of them are used by naturally occurring elements: s, p, d and f. Each sub-shell accommodates a certain number of electrons. Selenium may cause cataracts, damage to liver tissues, respiratory problems etc. 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? Sorry!, This page is not available for now to bookmark. These are the main commercial uses of selenium in today’s world. It is a soft metalloid similar to sulfur, unaffected by water and soluble in alkalis and nitric acid. 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. It is used in flat panel x – ray detectors. The control group in all trials was made up of participants on placebo capsules. Selenium forms few inorganic compounds, none of which are commercially important. Group Number: 16. Selenium can be extended through the use of plugins. Sulfur is placed above selenium and tellurium is placed below selenium in the 16th group of the periodic table. The number of participants included in the trials ranged from 40–70 and the trials lasted from three to six months. 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. 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 chemical element which is placed in the 16th group and 4th period in the periodic table. Selenium Atomic Number and Electronic Configuration, Atomic number of selenium is 34. 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. Selenium IDE can be extended through the use of plugins. It a company of type: Non-distributing corporation with 50 or fewer shareholders. It affects our ecosystem as well. It is combined with the physical properties of elements like tellurium and sulfur. 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. It has many isotopes. High concentrations of selenium may cause reproductive failures, defects in infants. Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … The Selenium Group Inc. is governed under the Canada Business Corporations Act - 2010-01-26. Overexposure of selenium may cause bronchitis, asthma, vomiting, lungs dysfunction, diarrhea, abdominal pain, shortness of breath and in severe cases death. Specializing in Law Firm & Private Wealth Management Industries. If you are looking for solutions of NCERT Textbook problems based on this topic, then log on to Vedantu website or download Vedantu Learning App. 116. Properties of selenium: Name of Element : Selenium Symbol of Element : Se Atomic Number of Selenium : 34 Atomic Mass: 78.96 amu Selenium is a chemical element which is placed in the 16th group and 4 th period in the periodic table. There are several ways you can help out, whether you’re a programmer, designer, QA engineer, writer, project manager, or just willing to help. Name of family that selenium belongs to? Selenium is certainly a team effort! 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. 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