Selenium is a chemical element; it has the symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous...

Selenium is an open source umbrella project for a range of tools and libraries aimed at supporting browser automation. It provides a playback tool for...

Selenium disulfide, also known as selenium sulfide, is a chemical compound and medication used to treat seborrheic dermatitis, dandruff, and pityriasis...

Selenium (34Se) has six natural isotopes that occur in significant quantities, along with the trace isotope 79Se, which occurs in minute quantities in...

Selenium sulfide can refer to either of the following: Selenium disulfide, SeS2 Selenium hexasulfide, Se2S6 This set index article lists chemical compounds...

Selenium is an essential micronutrient for animals, though it is toxic in large doses. In plants, it sometimes occurs in toxic amounts as forage, e.g....

Selenium dioxide is the chemical compound with the formula SeO2. This colorless solid is one of the most frequently encountered compounds of selenium...

Selenium tetrafluoride (SeF4) is an inorganic compound. It is a colourless liquid that reacts readily with water. It can be used as a fluorinating reagent...

Selenium deficiency occurs when an organism lacks the required levels of selenium, a critical nutrient in many species. Deficiency, although relatively...

oxygen family. Group 16 consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and the radioactive elements polonium (Po) and livermorium...

Selenium oxide may refer to either of the following compounds: Selenium dioxide, SeO2 Selenium trioxide, SeO3 Diselenium pentoxide, Se2O5 This set index...

commonly available selenium chlorides, the other example being selenium monochloride, Se2Cl2. SeCl4 is used in the synthesis of other selenium compounds. The...

Selenium chloride may refer to the following chemical compounds: Selenium monochloride, Se2Cl2 Selenium dichloride, SeCl2 Selenium tetrachloride, SeCl4...

Selenium oxydichloride is the inorganic compound with the formula SeOCl2. It is a colorless liquid. With a high dielectric constant (55) and high specific...

A selenium rectifier is a type of metal rectifier, invented in 1933. They were used in power supplies for electronic equipment and in high-current battery-charger...

Selenium hexafluoride is the inorganic compound with the formula SeF6. It is a very toxic colourless gas described as having a "repulsive" odor. It is...

notable for diverse content of micronutrients, especially a high amount of selenium. The wood of the Brazil nut tree is prized for its quality in carpentry...

Selenium fluoride may refer to: Selenium tetrafluoride (selenium(IV) fluoride), SeF4 Selenium hexafluoride (selenium(VI) fluoride), SeF6 This set index...

the range of shades visible in a print without reducing the contrast. Selenium toning is especially effective in this regard. Some toning processes can...

Selenium monochloride or diselenium dichloride is an inorganic compound with the formula Se2Cl2. Although a common name for the compound is selenium monochloride...

Selenium tetrabromide is an inorganic compound with a chemical formula SeBr4. Selenium tetrabromide could be produced by mixing elemental bromine and selenium:...

A selenium meter is a light-measuring instrument based on the photoelectric properties of selenium. The most common use of such light meters is measuring...

is the most common water-soluble selenium compound. Sodium selenite usually is prepared by the reaction of selenium dioxide with sodium hydroxide: SeO2...

encountered hydride of selenium. H2Se is a colorless, flammable gas under standard conditions. It is the most toxic selenium compound with an exposure...

The Riley oxidation is a selenium dioxide-mediated oxidation of methylene groups adjacent to carbonyls. It was first reported by Harry Lister Riley and...

Selenium hexasulfide is a chemical compound with the chemical formula Se2S6. Its molecular structure is an 8-membered ring, consisting of two selenium...

Selenium yeast is a feed additive for livestock, used to increase the selenium content in their fodder. It is a form of selenium currently approved for...

organoselenium compounds, chemical compounds containing carbon-to-selenium chemical bonds. Selenium belongs with oxygen and sulfur to the group 16 elements or...

Valley." The average selenium levels in Lake Koocanusa were 1 part per billion. Montana has established new standards for selenium—0.8 parts per billion...

toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found...