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selenium group number

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. Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. Selenium is a non-metal and can be compared chemically to its other non-metal counterparts found in Group … Selenium is a chemical element which is placed in the 16th group and 4 th period in the periodic table. It is used to make alloys. Element number 34, selenium, was discovered by Swedish chemist Jons Jacob Berzelius in 1817. Its 5 isotopes are stable which are. High concentration of selenium in fishes may cause swelling of gills and blood flow within the gills. We aim to make a company in the country which will make each and every product in the country rather importing. High concentrations of selenium may cause reproductive failures, defects in infants. We hope after reading this article you will be able to solve problems based on the topic. Selenium is a non metallic chemical element, member of the group XVI of the periodic table. Relative atomic mass: 78.971 (8) Selenium was discovered by Jöns Jacob Berzelius (SE) in 1817. Its electronic configuration is 1s. Most people can get their RDA of selenium from food. Selenium conducts some amount of electricity. 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. Selenium was discovered and isolated by Swedish Chemists Jons Jacob Berzelius and Johann Gottlieb Gahn in 1817. Se. Atomic Weight: 78.96. There are several ways you can help out, whether you’re a programmer, designer, QA engineer, writer, project manager, or just willing to help. Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. 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. Below is the syntax of FindElement command in Selenium web driver. The date of the company's last Annual Meeting is 2017-01-15. Selenium burns in air and is uneffected by water, but dissolve… It a company of type: Non-distributing corporation with 50 or fewer shareholders. Offering 20% off your current IT fees. SELENIUM GROUP LLC: DELAWARE LIMITED-LIABILITY COMPANY (LLC) WRITE REVIEW: Address: 1220 N. Market Street Suite 804 Wilmington, DE 19801: Registered Agent: Registered Agents, Ltd. Filing Date: December 21, 2007: File Number: 4478957: Contact Us About The Company Profile For Selenium Group … Period Number: 4. A relationship between the first three members of the group was recognized as early as Selenium is a non metallic chemical element exists in several allotropic forms, although three are generally recognized. Offering 20% off your current IT fees. They have the same number of valence electrons and the only elements Selenium is related to is Sulfur and Tellurium. Here are a number of plugins created and maintained by third parties. Few of its uses are listed below –. The control group in all trials was made up of participants on placebo capsules. 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. Sulfur is placed above selenium and tellurium is placed below selenium in the 16, group of the periodic table. Phase at Room Temperature: Solid. Selenium may cause cataracts, damage to liver tissues, respiratory problems etc. By object in turn can be used with various locator strategies such as ID, Name, Class Name, XPATH etc. 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. For commercial use selenium is mostly produced as a byproduct of refining of metal sulfide ores. Selenium is a non-metal and can be compared chemically to its other non-metal counterparts found in Group … In chemical activity and physical properties it resembles sulfur and tellurium. Selenium can also produce electricity directly from sunlight and is used in solar cells. Element Classification: Non-metal. Group Name: Chalcogen. 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 It is a nonmetal element with the atomic number 34. Selenium is more in common with Sulfur because they are in the same group. It is rarely found as pure ore or in pure elemental form. Symbol of the selenium element is Se. Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. WebElement elementName = driver.findElement(By.LocatorStrategy("LocatorValue")); It works as an antifungal agent. It is used in photocells as it is a photoconductor. 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. Symbol of the selenium element is Se. It is used in fluorescent quantum dot and surge protectors. In some studies to determine if selenium could aid in prostate cancer prevention, men took 100 micrograms daily. Say what? It is rarely found as pure ore or in pure elemental form. Managed IT Services in Toronto. Selenium is used in various fields mainly due to its properties such as photoconductivity, semiconductor of electricity etc. It affects our ecosystem as well. Arsenic is found at the left of selenium in the 4th period and 15th group. It is a component of many enzymes such as thioredoxin reductase, deiodinase enzymes. Its 5 isotopes are stable which are 74Se, 76Se, 77Se, 78Se, 80Se. 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. 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. Selenium-75 is used in industrial radiology as a gamma source. The electron configuration for selenium is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 4. Specializing in Law Firm & Private Wealth Management Industries. Selenium is a chemical element which is placed in the 16th group and 4th period in the periodic table. Pro Lite, Vedantu Se-77 and Se-78 are used for the production of the therapeutic radioisotope Br-77. It can change light energy into electrical energy. 116. Properties of selenium: Name of Element : Selenium Symbol of Element : Se Atomic Number of Selenium : 34 Atomic Mass: 78.96 amu It shows similar properties as sulfur, tellurium, and arsenic. 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. Selenium is a chemical element with symbol Se and atomic number 34. Some symptoms are more severe than others, but all represent a disruption in wellness. This ends our coverage on the topic “Selenium”. Symbol of the selenium element is Se. The Selenium Group Inc. is governed under the Canada Business Corporations Act - 2010-01-26. Classified as a nonmetal, Selenium is a solid at room temperature. Sorry!, This page is not available for now to bookmark. 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. 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. 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 was discovered and isolated by Swedish Chemists Jons Jacob Berzelius and Johann Gottlieb Gahn in 1817. 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. Symbol of the selenium element is Se. They can introduce new commands to the IDE or integrate with a third-party service. What is Selenium? Selenium is a chemical element which is placed in the 16th group and 4, period in the periodic table. Its 7 isotopes are available in nature. We’ll work with you to get you set up to contribute. According to Pauling scale, its electronegativity is 2.55. 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 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. 311 likes. Group Name: Chalcogen. Se-80 is used for the production of the medical radioisotope Br-80m. The word selenium is derived from the Greek word ‘. Arsenic is found at the left of selenium in the 4th period and 15. group. In selenium, the first energy level has two electrons in sub-shell s. 600-2000 messages in 60 min. Platforms Supported by Selenium + Browsers - Browsers. This trace element is even involved in DNA synthesis. Its electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4 or it can be written as [Ar] 3d10 4s2 4p4. What's in a name? Selenium dioxide is used in manganese electrolysis. The origin of the name comes from the Greek word selene meaning moon. Generally required or necessary amounts of selenium is consumed by animals and humans through food, but more amount of selenium is consumed by them through its accumulation in the environment. 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. Although its deficiency may also cause many adverse effects on health. For questions about this page, please contact Steve Gagnon. The brighter the light, the better selenium conducts electricity. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. As it is found in the 16th group so, it is a p – block element. 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. Selenium isotopes are mainly used for the production of medical and industrial radioisotopes. Selenium is a chemical element with the symbol Se and atomic number 34. 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. From the Greek word for the moon, selene. The word selenium is derived from the Greek word ‘selene’ which means moon. It is widely used in glassmaking and pigmentation. It is generally found in metal sulfide ores. 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? Such as in brasses selenium is used in place of lead which is more toxic than selenium. Selenium toxicity is often caused by over-supplementation and can impact the human body in a number of ways. If you’re interested in helping, the best way to connect with us is at the Selenium Developers Group. . 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. It can change light energy into electrical energy. Selenium side effects. 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. Element number 34, selenium, was discovered by Swedish chemist Jons Jacob Berzelius in 1817. Specializing in Law Firm & Private Wealth Management Industries. These are the main commercial uses of selenium in today’s world. What's in a name? For more information on how to create your own plugin or have it listed, learn more here. 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. Small amount of selenium salts is necessary for proper functioning of cells in many organisms. The chemically uncharacterized synthetic element livermorium (Lv) is predicted to be a chalcogen as well. Optical Properties – Selenium conducts some amount of electricity. Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … 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. 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. Originally believing the material was tellurium, Berzelius eventually realized that it was actually a previously unknown element. It is a soft metalloid similar to sulfur, unaffected by water and soluble in alkalis and nitric acid. Atomic number of selenium is 34. 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). It is used in thin – film solar cells of copper indium gallium selenide. It is a nonmetal element with the atomic number 34. They include selenious acid (H2SeO3), selenium dichloride (SeCl2) and selenium oxychloride (SeOCl2). It shows similar properties as sulfur, tellurium, and arsenic. 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 . This configuration is also written as [Ar] 4s 2 3d 10 4p 4, according to Dr. Anne Marie Helmenstine, a contributor to About.com. 34 Se Selenium 78.971. Write your own or install one that someone else has already written. Due to its various properties sometimes, it is considered as a metalloid as well. Today, most selenium is obtained as a byproduct of refining copper. It has many isotopes. 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 WebElement elementName = driver.findElement(By.LocatorStrategy("LocatorValue")); Se-74 is used for the production of Se-75 which is used as a source in gamma radiography. The number of participants included in the trials ranged from 40–70 and the trials lasted from three to six months. It is used in flat panel x – ray detectors. Selenium is a metallic main group element, found in Group VIb of the periodic table. Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … It can exist in two forms; as a silvery metal or a red powder. Now a days, the selenium compound (selenium sulfide) is widely used for the treatment of dandruff. Below is the syntax of FindElement command in Selenium web driver. We hope you enjoyed learning and were able to grasp the concepts. Selenium Atomic Number and Electronic Configuration, Atomic number of selenium is 34. Sulfur is placed above selenium and tellurium is placed below selenium in the 16th group of the periodic table. Selenium is a chemical element which is placed in the 16th group and 4th period in the periodic table. It shows similar properties as sulfur, tellurium, and arsenic. 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 IDE can be extended through the use of plugins. although its key isotope is 80Se. Pro Lite, Vedantu Due to its various properties sometimes, it is considered as a metalloid as well. Selenium is an essential trace element, but its high concentrations are harmful for the environment. Relative atomic weight of selenium is 78.96. Element Name: Selenium. 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 Group. Selenium deficiency may cause Kashin – beck disease, stress, low functioning of brain, white muscle disease in ruminants, dysfunction of thyroid gland etc. Selenium is also a semiconductor and is used in some types of solid-state electronics as well as in rectifiers, devices which convert alternating current electricity into direct current electricity. This code sends approx. 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. In the past selenium used to dominate the electronics market as it is a semiconductor but presently silicon has almost replaced selenium. Managed IT Services in Toronto. In chemical activity and physical properties it resembles sulfur and tellurium. The active treatment in all trials was selenium capsules (200 μg per day in two trials and 256 μg per day in one trial). It is a nonmetal element with the atomic number 34. Group Number: 16. 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 toxic element and its high concentrations are not only harmful for the environment but for human health as well. 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. By doing so, you will be able to access free PDFs of NCERT Solutions as well as Revision notes, Mock Tests and much more. 34 Se (Selenium) Flashcard of Selenium. Name of family that selenium belongs to? Thus, it is a semiconductor. Apart from these it has many synthetic isotopes as well, although all of its synthetic isotopes are unstable in nature. For commercial use selenium is mostly produced as a byproduct of refining of metal sulfide ores. It is used in copper alloys as well. Out of seven naturally occurring isotopes, 5 are stable and two are unstable. Automated Whatsapp messaging program sends messages to multiple Whatsapp phone number using selenium. 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. Stop taking selenium and call your doctor at once if you have: Melting Point: 493.65 K (220.5°C or 428.9°F), Density: 4.809 grams per cubic centimeter. Selenium can be extended through the use of plugins. Selenium is a chemical element that is placed in the oxygen group 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). It shows similar properties as sulfur, tellurium, and arsenic. Atomic Number: 34. By object in turn can be used with various locator strategies such as ID, Name, Class Name, XPATH etc. This is a group of company. Selenium's resistance to the flow of electricity is greatly affected by the amount of light shining on it. Atomic Weight: 78.971. This last form conducts electricity better in the light than in the dark and is used in photocells. It is often found in combination with metals like mercury, copper, silver or lead. Organoselenium compounds are used in vulcanization of rubber. In fact, the enzymes that convert the thyroid hormone thyroxine (T4) to triiodothyronine (T3) are selenium-dependent (Shreenath, 2019). Vedantu academic counsellor will be calling you shortly for your Online Counselling session. Selenium is also a photoconductor. Selenium forms few inorganic compounds, none of which are commercially important. Jons Jacob Berzelius and isolated by Johann Gottlieb Gahn, 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4 or [Ar] 3d10 4s2 4p4. Overexposure of selenium may cause bronchitis, asthma, vomiting, lungs dysfunction, diarrhea, abdominal pain, shortness of breath and in severe cases death. As it is found in the 16th group so, it is a p – block element. 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. ’ which means moon. Some symptoms are more severe than others, but all represent a disruption in wellness. It is generally found in metal sulfide ores. Selenium enters the environment as selenium dioxide through combustion of coal and oils. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Selenium is found as red, grey and black allotropes of it. Selenium is also a photoconductor. Group Number: 16. It is a nonmetal element with the atomic number 34. Thus, it is a semiconductor. Selenium is pronounced as si-LEE-nee-em.

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