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Selenium occurs naturally in a number of inorganic forms, including selenide, selenate, and selenite. In soils, selenium most often occurs in soluble forms such as selenate (analogous to sulfate), which are leached into rivers very easily by runoff.
Selenium has a biological role, and it is found in organic compounds such as dimethyl selenide, selenomethionine, selenocysteine, and methylselenocysteine. In these compounds, selenium plays a role analogous to that of sulfur.
Selenium is most commonly produced from selenide in many sulfide ores, such as those of copper, silver, or lead. It is obtained as a byproduct of the processing of these ores, from the anode mud of copper refineries and the mud from the lead chambers of sulfuric acid plants. These muds can be processed by a number of means to obtain free selenium.
Natural sources of selenium include certain selenium-rich soils, and selenium that has been bioconcentrated by certain plants. Anthropogenic sources of selenium include coal burning and the mining and smelting of sulfide ores. (Source wikipedia)
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Is technetium found in a compound or pure elemental form?
Technetium is found in both in a compound and pure forms
Is selenium a mixture?
No, selenium is a chemical element found on the periodic table with the atomic number 34 and symbol Se. It is a non-metal element that can exist in various forms, such as pure elemental selenium or in compounds with other elements.
Is selenium powder a pure substance?
Selenium is a pure chemical element.
Can helium be found in its pure Elemental form in nature or is it so reactive that it is only found in compounds?
Helium is a noble gas and is generally found in its elemental form in nature as it is very unreactive. It can be found in natural gas deposits and sometimes released during the extraction of natural gas.
How do you make selenium sulfide?
Selenium is an element it was "made" in the nova of an exploding star several billion years ago.Selenium is found on Earth in minerals such as pyrites where it partially replaces the sulfides. Native selenium is very rare. Most elemental selenium on the market comes as a byproduct of metal refining such as copper or the production of sulfuric acid.
Is technetium found in a compound or pure elemental form?
Technetium is found in both in a compound and pure forms
Is boron found usually in a compound or in pure elemental form?
Boron is typically found in nature as a compound rather than in pure elemental form. Examples include borax, boric acid, and various borates.
Is it found in a compound or in pure from?
It can be found in both compound and pure forms. In nature, elements are often found in compounds, while in labs, they can be isolated and purified into their elemental form.
Is selenium a mixture?
No, selenium is a chemical element found on the periodic table with the atomic number 34 and symbol Se. It is a non-metal element that can exist in various forms, such as pure elemental selenium or in compounds with other elements.
Is Titanium found usually in pure or compound elemental form?
Titanium is typically found in compound form, such as titanium dioxide, rather than in pure elemental form. It is commonly extracted from minerals like ilmenite and rutile, and then processed to obtain pure titanium metal.
Is hydrogen found as a pure element in nature or as a compound?
Hydrogen is found in nature primarily as a compound, such as in water (H2O) or hydrocarbons. Pure elemental hydrogen is rare in nature but can be found in some volcanic gases or certain chemical reactions.
What are the substances found in selenium?
Selenium is a chemical element. It can be said to be a pure substance; there is nothing else found in it.
What is a common compound found that includes helium?
Helium does not combine with other elements and pure helium will exist by itself as elemental helium.
Is lead in compound or in pure elemental form?
Lead is typically found in compound form rather than in its pure elemental form. Common compounds include lead oxide, lead nitrate, and lead sulfide. Lead is rarely found in its native form in nature due to its high reactivity with other elements.
Is silver found in a compound form or in a pure element form?
Silver is typically found in nature in the form of compounds, such as silver sulfide or silver chloride. However, it can also be found in its pure elemental form, especially when it occurs as native silver in deposits of ore.
Can helium be found it its pure elemental form?
Yes. helium is found in its elemental form. it is chemically inert as it has completely filled orbitals.
Is potassium bicarbonate elemental potassium?
No, potassium bicarbonate is a compound that contains potassium, hydrogen, carbon, and oxygen. It is not the pure elemental form of potassium.
