Selenium side effects. “How To Locate Element By Name Locator” 3. 1. Formula The Overflow Blog Making the most of your one-on-one with your manager or other leadership Common Compounds of Selenium Se [Se +4, Se +6]. This family has six electrons in the outermost shell. 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 In this post, we discuss “How To Locate Element By Tag Name Locator”. 1) What is the charge on the ion that Selenium forms in an ionic compound? And the element can only be reached via class name. The effects of selenium in preventing cancer and neurologic diseases may be mediated by selenium-binding proteins, and decreased expression of this gene may be associated with several types of cancer. Find Selenium, number 34, and you can see that two spaces to its right is a noble gas. Finally, the following commonly mis-capitalized attribute/property names are evaluated as expected: If the given name is "class", the "className" property is returned. Selenium sulfide is a probable carcinogen. The energy released when an electron is added to the neutral atom and a negative ion is formed. Given it's such a useful feature I'd have imagined someone must … Predicted data is generated using the US Environmental Protection Agency’s EPISuite™. Selenium tetrafluoride (Se F 4) is an inorganic compound.It is a colourless liquid that reacts readily with water. What is the charge on the selenium ion? Electron Affinity – Selenium. 3) What other ions are isoelectronic with this noble gas? Find the below links on How to find elements on a web page using different types of locators. Selenium, an element required nutritionally in trace quantity, forms compounds analogous to sulfur. Documentation for Selenium. I was thinking Krypton because it is a noble gas and it is the closest to Selenium but I am not sure. 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. I also found myself in a similar position a couple of weeks ago. If the given name is "readonly", the "readOnly" property is returned. I've been trying the last hour to delete an element by without any success. Many of selenium’s compounds, such as selenates and selenites, are highly toxic. Name the following ions: SeO4^2- Se^2- HSe^- HSeO3 Structure, properties, spectra, suppliers and links for: Selenite ion, 14124-67-5, SeO3(2-), [SeO3](2-). You can also do this by creating a custom ElementLocatorFactory (or simply passing in divA into the DefaultElementLocatorFactory) to see if it's a child of the first div - you would then call the appropriate PageFactory initElements method. I was thinking Bromine since again it is closest to Krypton. In the previous post we have seen “locators in Selenium“. Browse other questions tagged python reactjs selenium ionic-framework or ask your own question. 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: Selenium specifically has an electron configuration of 2-8-18-6. Selenium is an essential nutrient that exhibits potent anticarcinogenic properties, and deficiency of selenium may cause certain neurologic diseases. This means is gains two electrons when forming an ion. Selenium WebDriver. navigation The Selenium Browser Automation Project. 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. Property Name Property Value Reference; Molecular Weight: 157.9 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Hydrogen Bond Donor Count: 0 Selenium naturally appears in water and some foods. The EPA describes selenium as not classifiable for human carcinogenicity. Selenium exhibits photovoltaic action, where light is converted directly into electricity, and photoconductive … Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. 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. What mon atomic ions do barium and selenium make? Question: Electron Configuration Element Or Ion Name Selenide Ion (Selenium) Bromine Block Membership Noble Gas Electron Configuration [Ar]433d104p 1325 273523843230104p (Selenium Ion Is Se', So There Are Two Extra Electrons) # And Configuration Of Valence Electrons 8 Valence, 4s 4p P-block 1s2 Fluoride Ion Beryllium [Kr]5s 1s 2s 2p 3s 3p64s 3d? Electron affinity of Selenium is 195 kJ/mol. 2) What noble gas is isoelectronic with this ion. Origin of the name: The name is derived from 'selene', the Greek name for the Moon. I found this by looking at the periodic table. It can be used as a fluorinating reagent in organic syntheses (fluorination of alcohols, carboxylic acids or carbonyl compounds) and has advantages over sulfur tetrafluoride in that milder conditions can be employed and it is a liquid rather than a gas. Selenium is a powerful mineral that is essential for the proper functioning of your body. Note: The reason for this behavior is that users frequently confuse attributes and properties. I am not sure about this. Stop taking selenium and call your doctor at once if you have: The name of the anion is Selenide, and it has a -2 charge. Selenium is a mineral found in the soil. For example, the chloride ion (Cl-) is isoelectronic with the noble gas argon at the end of period 3, whereas an aluminum ion (Al3+) is isoelectronic with the noble gas neon at the end of period 2. Hydrides The term hydride is used to indicate compounds of the type M x H y and not necessarily to indicate that any compounds listed behave as hydrides chemically. I'm looking for a generic way to get the next element within Selenium. 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. SO, the number of Ion is -2. because to far or difficult to donate 6. 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. Meaning of name: selenium: Melting point: selenium: Melting point of the highest fluoride: selenium: Melting point of the hydride: selenium: Menu to … you should know periodic table, Selenium on 6A grup. Selenium’s legal airborne permissible exposure limit (PEL) is 0.2 mg m-3 averaged over an 8-hour shift. Compound Name. If you want to create robust, browser-based regression automation suites and tests, scale and distribute scripts across many environments, then you want to use Selenium WebDriver, a collection of language specific bindings to drive a browser - the way it is meant to be driven. “How To Locate Element By ID Locator” 2. In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. 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 forms selnides which contain the ion Se2-. Selenium, when forming an ion, gains two electrons. I hope I helped. So, to make selenium to be a stable molecule, it should need to accept 2 electrons. Selenium is a member of the sulfur family with elements including tellurium and polonium. In compounds of selenium (where known), the most common oxidation numbers of selenium are: 6, 4, 2, and -2. 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