A negative ion (anion) is formed after gain of electrons in the atom.A positive ion (cation) is formed after loss of electrons from the atom. Meaning of name: selenium: Melting point: selenium: Melting point of the highest fluoride: selenium: Melting point of the hydride: selenium: Menu to … Selenium, when forming an ion, gains two electrons. Selenium is a member of the sulfur family with elements including tellurium and polonium. I hope I helped. you should know periodic table, Selenium on 6A grup. In the previous post we have seen “locators in Selenium“. I also found myself in a similar position a couple of weeks ago. Selenium side effects. 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. An ionic compound, Barium selenide or BaSe is formed, with the ions Ba2+ and Se2-. The EPA describes selenium as not classifiable for human carcinogenicity. “How To Locate Element By ID Locator” 2. What is the charge on the selenium ion? Name: Selenium Symbol: Se Atomic Number: 34 Atomic Mass: 78.96 amu Melting Point: 217.0 °C (490.15 K, 422.6 °F) Boiling Point: 684.9 °C (958.05005 K, 1264.8201 °F) Number of Protons/Electrons: 34 Number of Neutrons: 45 Classification: Non-metal Crystal Structure: Hexagonal Density @ 293 K: 4.79 g/cm 3 Color: gray Atomic Structure Selenium is a mineral found in the soil. Selenium WebDriver. Find the below links on How to find elements on a web page using different types of locators. I was thinking Bromine since again it is closest to Krypton. I found this by looking at the periodic table. SO, the number of Ion is -2. because to far or difficult to donate 6. Selenium is an essential nutrient that exhibits potent anticarcinogenic properties, and deficiency of selenium may cause certain neurologic diseases. This family has six electrons in the outermost shell. 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 is a powerful mineral that is essential for the proper functioning of your body. Selenium specifically has an electron configuration of 2-8-18-6. Name the following ions: SeO4^2- Se^2- HSe^- HSeO3 Compound Name. Symbols and Names of Some Common Polyatomic Ions and One Molecule: NH 4 + ammonium ion: OH-hydroxide ion: CN-cyanide ion: SO 4 2-sulfate ion: O 2 2-peroxide ion: CNO-cyanate ion: HSO 4-hydrogen sulfate ion: C 2 H 3 O 2-acetate ion: SCN-thiocyanate ion: SO 3 2-sulfite ion: ClO 4-perchlorate ion: CO 3 2-carbonate ion: In this post, we discuss “How To Locate Element By Tag Name Locator”. Common Compounds of Selenium Se [Se +4, Se +6]. In compounds of selenium (where known), the most common oxidation numbers of selenium are: 6, 4, 2, and -2. Stop taking selenium and call your doctor at once if you have: Most research shows that people with high levels of selenium, people who eat diets high in selenium, and people who take selenium supplements for many years have an increased risk of type 2 diabetes. Jquery has a .next() function and overloads to allow a given type so I imagine there may be a JS based solution available for Selenium. The six electrons in the outermost shell allow selenium to have a variety of valence numbers. From a list of almost 2000 names and formulas, students will be given the opportunity to practice their ability to name ionic compounds, given the formula, and determine the formula given the name. Selenium’s legal airborne permissible exposure limit (PEL) is 0.2 mg m-3 averaged over an 8-hour shift. Structure, properties, spectra, suppliers and links for: Selenite ion, 14124-67-5, SeO3(2-), [SeO3](2-). What mon atomic ions do barium and selenium make? 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