Comprehensive data on the chemical element selenium is provided on this page including scores of properties, element names in many languages, most known nuclides of selenium common chemical compounds are also provided for many elements. Selenium's properties, interesting facts, discovery, videos, images, states, energies, appearance and characteristics the chemical element selenium is classed as a chalcogen and a nonmetal it was discovered in 1818 by jacob berzelius data zone classification. Selenium webdriver example tutorial to show how to create object repository using properties file to store element locators and then how to access those locators from object repository in selenium webdriver software automation testing tool, there is not any built in facility to create object repository. This portal will provide essential information on selenium and manual testing and also provides faqs on manual testing, selenium and corejava one of the main purposes of the site is to prepare people for the interview which includes questions along with sample resumes.
Selenium has already cemented its place as a de-facto web test automation standard and appium is providing very clean high level api that can be quickly adopted by selenium developers, as it nicely abstracts lot of the messy stuff related to running tests. The discovery of selenium berzelius and gahn met at gripsholm in august 1817 the new element had properties of a metal, and was similar to sulfur, initially suggesting it to be a new species of sulfur in its metallic state, it had a brilliant grayish lustre. In selenium properties files are mainly used to store gui locators / elements, and also global fields like database configuration details 'properties' files are mainly used in java programs to maintain project configuration data, database config or project settings etc each parameter in properties file.
Complete guide to set object repository in selenium webdriver whenever you talk about repository by the name itself you can think that it is kind of object repository is the collection of object and object here is locatorobject repository in selenium webdriver is quite easy to design so let's get started. Using selenium and webdriver from chromedriver - webdriver for chrome the usage of selenium-webdriver with electron is the same with upstream, except that you have to manually specify how to connect chrome driver and where to find electron's binary. 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 originally believing the material was tellurium, berzelius eventually realized that it was.
Selenium and tellurium are often associated with each other they tend to occur together in the earth and have somewhat similar properties discovery and naming selenium was discovered in 1818 by swedish chemists jons jakob berzelius (1779-1848) and j g gahn (1745-1818. Properties selenium exists in several allotropic forms, although three are generally recognized selenium can be prepared with either an amorphous or a crystalline the discovery of the new world is often related from the perspective of the spanish colonisers of the 15th and 16th centuries. What is an object repository an object repository is a common storage location for all objects in selenium webdriver context, objects would typically be the locators used to uniquely identify web elements the major advantage of using object repository is the segregation of objects from test cases. Selenium was discovered in 1817 by berzelius he found it associated it with tellurium who selenium is named after what is the atomic structure of selenium is used in xerography for reproducing and copying documents, letters, etc it is used by the glass industry to decolorize glass and to make. Date of discovery 1817 name of discoverer selenium was discovered by a swedish chemist named jöns jacob berzelius, in 1817 additional properties melting point: 4289 °f (2205 °c or 49365 k.
Selenium: compound properties bond strengths lattice energies of selenium halides, hydrides, oxides (where known) and reduction potentials where known selenium was discovered by jöns berzelius in 1817 at sweden. I have some question about selenium ide and selenium webdriver. Selenium is a chemical element with symbol se and atomic number 34 it is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below.
Year of discovery 1817 discoverer berzelius, jöns jacob thermal properties melting point [celsius scale] 221 heat capacity is an extensive property of matter, meaning it is proportional to the size of the system heat capacity c has the unit of energy per degree or energy per kelvin. Selenium discovery date 1817 discovered by jöns jacob berzelius origin of the name glossary group a vertical column in the periodic table members of a group typically have similar properties and electron configurations in their outer shell.
Properties: selenium has an atomic radius of 117 pm, a melting point of 2205°c, boiling point of 685°c, with oxidation states of 6, 4, and -2 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 has good photovoltaic and photoconductive properties, and it is used extensively in electronics, such as photocells, light meters and solar cells the second largest use of selenium is in the glass industry: selenium is used to remove colour from glass, to give a red colour to glasses and. Classification, properties and characteristics of selenium atomic data of selenium (element 34) who discovered it: jons jacob berzelius when, where, and how was it discovered in 1817 at stockholm, berzelius he was fascinated by some red-brown sediment at the bottom of his sulfuric acid. Selenium is a group 16 element with the atomic number 34 it is a metalloid, and shares several of its properties with oxygen and sulfur, which are the jons jakob berzelius discovered the new element selenium when he was asked to find the reason for a spate of illnesses in workers manning a sulfuric.