what is a selenium ion called

During the formation of a bond, the last shell of selenium receives two electrons and turns into a selenium ion(Se 2-). That is, selenium is an anion element. That is, selenium is an anion element. Se + 2e – → Se 2-

Full Answer

What is selenium?

Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between the elements on either side in the periodic table, sulfur and tellurium.

Is selenium a metalloid or metal?

| references. 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 in the periodic table, sulfur and tellurium, and also has similarities to arsenic.

How many protons and electrons are in selenium?

Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. The chemical symbol for Selenium is Se. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. The nucleus is composed of protons and neutrons.

What is the chemical formula for selenium?

Analogous to the behavior of other chalcogens, selenium forms hydrogen selenide, H 2 Se. It is a strongly odiferous, toxic, and colorless gas. It is more acidic than H 2 S.

What is the ion for selenium?

Selenium, ion(4+) | Se+4 - PubChem.

Does selenium become a cation or anion?

Selenium has an atomic number of 34. This means that it has 34 protons, and in the uncharged state, 34 electrons as well. It forms an ANION by receiving two electrons. It thereby acquires a charge of -2.

What is selenium ionic charge?

ion charge: +6.

What is the chemical name of selenium?

selenium (Se), a chemical element in the oxygen group (Group 16 [VIa] of the periodic table), closely allied in chemical and physical properties with the elements sulfur and tellurium. Selenium is rare, composing approximately 90 parts per billion of the crust of Earth.

Does selenium have a charge?

Elemental Se has a charge of 0.

Does selenium gain or lose electrons?

Selenium is more likely to gain two electrons. It will become Se2− ion.

What ion is formed by se?

Therefore, the ion of selenium has the charge of 2-. It's known as selenide ion.

How do you read ions?

When writing the symbol for an ion, the one- or two-letter element symbol is written first, followed by a superscript. The superscript has the number of charges on the ion followed by a + (for positive ions or cations) or - (for negative ions or anions). Neutral atoms have a charge of zero, so no superscript is given.

How do you determine an ion?

0:533:12How to Identify the Charge of an Ion : Chemistry Lessons - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo if it's an ion it has eight already which means that it has one more electron than it has aMoreSo if it's an ion it has eight already which means that it has one more electron than it has a neutral charge. So a chloride a chlorine ion or chloride is going to have a charge of negative one.

What is a selenium atom?

Selenium is a chemical element with the 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 in the periodic table, sulfur and tellurium, and also has similarities to arsenic.

Why is selenium named selenium?

It was Berzelius who discovered selenium in 1817, as an impurity in sulphuric acid. Tellurium had already been discovered, and named after the Greek word for earth, so he named selenium using the Greek word for moon, selene.

What is a chemical property of selenium?

The chemical properties of selenium are similar to sulfur. Selenium combines with metals and many nonmetals directly or in aqueous solution. The selenides resemble sulfides in appearance, composition, and properties (Hoffmann and King 1997).

Is Phosphorus a cation or anion?

anionSo, while phosphorus is an anion, it will usually combine with iron or aluminium and act like a cation.

What ion will the element selenium form if it gains 2 electrons Brainly?

Loved by our community. When atom A gains two electrons it forms an anion by developing 2 negative charges over it as there are 2 electrons more than the number of protons in the ion.

What is the action of selenium and magnesium metal?

Selenium combined with magnesium is a promising therapeutic strategy with lipid-lowering and antioxidative effects that protects the liver against hyperlipidemia.

Is Iodine a cation or anion?

Iodine is a nonmetallic element. With this, it has the tendency to gain electrons and become an anion. The anionic form of iodine is I− .

What is the most stable isotope of Selenium?

Selenium also has numerous unstable synthetic isotopes ranging from 64 Se to 95 Se; the most stable are 75 Se with a half-life of 119.78 days and 72 Se with a half-life of 8.4 days.

How much selenium is produced in 2011?

Selenous acid is bubbled with sulfur dioxide ( reduction step) to give elemental selenium. About 2,000 tonnes of selenium were produced in 2011 worldwide, mostly in Germany (650 t), Japan (630 t), Belgium (200 t), and Russia (140 t), and the total reserves were estimated at 93,000 tonnes.

What is the angle of selenium?

The most stable and dense form of selenium is gray and has a hexagonal crystal lattice consisting of helical polymeric chains, where the Se-Se distance is 237.3 pm and Se-Se-Se angle is 130.1° .

How is selenium oxide formed?

Selenium forms two oxides: selenium dioxide (SeO 2) and selenium trioxide (SeO 3 ). Selenium dioxide is formed by the reaction of elemental selenium with oxygen: Structure of the polymer SeO 2: The (pyramidal) Se atoms are yellow. It is a polymeric solid that forms monomeric SeO 2 molecules in the gas phase.

What is the structure of Selenium?

When rapidly melted, it forms the black, vitreous form, usually sold commercially as beads. The structure of black selenium is irregular and complex and consists of polymeric rings with up to 1000 atoms per ring . Black Se is a brittle, lustrous solid that is slightly soluble in CS 2. Upon heating, it softens at 50 °C and converts to gray selenium at 180 °C; the transformation temperature is reduced by presence of halogens and amines.

How many isotopes does selenium have?

Selenium has seven naturally occurring isotopes. Five of these, 74 Se, 76 Se, 77 Se, 78 Se, 80 Se, are stable, with 80 Se being the most abundant (49.6% natural abundance). Also naturally occurring is the long-lived primordial radionuclide 82 Se, with a half-life of 9.2×10 19 years. The non-primordial radioisotope 79 Se also occurs in minute quantities in uranium ores as a product of nuclear fission. Selenium also has numerous unstable synthetic isotopes ranging from 64 Se to 95 Se; the most stable are 75 Se with a half-life of 119.78 days and 72 Se with a half-life of 8.4 days. Isotopes lighter than the stable isotopes primarily undergo beta plus decay to isotopes of arsenic, and isotopes heavier than the stable isotopes undergo beta minus decay to isotopes of bromine, with some minor neutron emission branches in the heaviest known isotopes.

What is Selenium used for?

Selenium is a semiconductor and is used in photocells. Applications in electronics, once important, have been mostly replaced with silicon semiconductor devices. Selenium is still used in a few types of DC power surge protectors and one type of fluorescent quantum dot .

Why did Berzelius think tellurium was the element?

At first he thought it was the element tellurium because it gave off a strong smell of radishes when heated , but he eventually realised that it was in fact a new element. He also noted that it was like sulfur and indeed had properties intermediate between sulfur and tellurium. Berzelius found that selenium was present in samples of tellurium and gave that element its characteristic smell. He also became affected by it personally – it can be absorbed through the skin – and it caused him to experience the bad breath associated with those who work with this element.

What is the use of selenium in glass?

The biggest use of selenium is as an additive to glass. Some selenium compounds decolourise glass, while others give a deep red colour. Selenium can also be used to reduce the transmission of sunlight in architectural glass, giving it a bronze tint. Selenium is used to make pigments for ceramics, paint and plastics.

How many atoms of selenium are in the human body?

Our bodies contain about 14 milligrams, and every cell in a human body contains more than a million selenium atoms.

What is the purpose of Selenium?

Selenium is used to make pigments for ceramics, paint and plastics. Selenium has both a photovoltaic action (converts light to electricity) and a photoconductive action (electrical resistance decreases with increased illumination). It is therefore useful in photocells, solar cells and photocopiers.

When was Selenium discovered?

Selenium was discovered by Jöns Jacob Berzelius at Stockholm in 1817. He had shares in a sulfuric acid works and he was intrigued by a red-brown sediment which collected at the bottom of the chambers in which the acid was made.

What is chemical abstracts service?

The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems.

What is density in science?

Density is the mass of a substance that would fill 1 cm 3 at room temperature. Relative atomic mass. The mass of an atom relative to that of carbon-12. This is approximately the sum of the number of protons and neutrons in the nucleus.

What is the source of selenium?

Electrolytic copper refinery slimes are the principal source of selenium and its sister element, tellurium ... Slimes generated by the refining of primary copper, copper produced from ores and concentrates, generally contain from 5-25% selenium and 2-10% tellurium. ... Some of the first processes to recover selenium on a commercial basis were based on roasting of copper slimes with soda ash to convert both selenium and tellurium to the +6 oxidation state. ... Slimes are intensively mixed with sodium carbonate, a binder such as bentonite, and water to form a stiff paste. The paste is extruded or pelletized and allowed to dry. ... Roasting occurs between temperatures of 530-650 °C. ... Conversion of both elements to the hexavalent form is complete. The roasted pellets or extrudes are ground and leached in water. The hexavalent selenium dissolves as sodium selenate, Na2SeO4. Sodium tellurate, being highly insoluble in the now very strongly alkaline solution, remains in the residue. The separation between selenium and tellurium is readily achieved, provided all tellurium is oxidized to the hexavalent state. ... There are two processes commonly employed for reducing selenium from solution. ... In the first process, employed commercially for may years, selenium is leached from the slimes in the form of the hexavalent sodium selenate. It is recovered from solution by crystallization and the crystalline sodium selenate is mixed with charcoal. Under controlled conditions of heating, the Na2SeO4 is reduced to sodium selenide. The sodium selenide cake is leached with water to form a typically liver-red solution of sodium selenide, which is readily oxidized to the elemental form by blowing air through the solution. ... In the second process, reduction of the hexavalent selenium is accomplished using concentrated hydrochloric acid or ferrous iron salts catalyzed by chloride ions as the reductant.

What is the metabolite of selenium?

Selenium supplements are typically available in the form of sodium selenite which is metabolized to selenide through either glutathione conjugation and subsequent reduction by glutathione reductase enzymes or reduction by thioredoxin reductases. Selenide is further metabolized to selenocystein by cysteine synthases and to selenophosphate by selenophosphate synthases. Selenide is also metabolized progressively to methyl-selenol, dimethyl selenide, then trimethylselenonium. Selenocysteine is degraded to methyl-selenol, pyruvate and ammonia by cysteine beta lyase. Selenocystein reacts with oxygen to form selenocysteine selenoxide which spontaneously degrades to methylselenic acid, pyruvate and ammonia. Methylselenic acid can be converted to methylselenol via conjugation with thiol groups on proteins like glutathione.

How far should you isolate a spill?

Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

What is Selenium 75 used for?

Selenium-75, incorporated into the aerosols, was used to determine the Se content in the whole animal, excreta, and individual tissues as a function of time. Virtually all inhaled selenious acid aerosol was rapidly absorbed into the blood from the lungs, gastrointestinal tract, and the nasal membranes.

How to treat a chemical in the eye?

Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical. Skin: If this chemical contacts the skin, immediately wash the contaminated skin with soap and water. If this chemical penetrates the clothing, immediately remove the clothing, wash the skin with soap and water, and get medical attention promptly. Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible. Swallow: If this chemical has been swallowed, get medical attention immediately. (NIOSH, 2016)

What is trace element?

A group of chemical elements that are needed in minute quantities for the proper growth, development, and physiology of an organism. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) (See all compounds classified as Trace Elements .)

How long does selenium 75 stay in the body?

Selenium-75 in these organs had a biological half-life of 30 to 40 days. Approximately 50% of the deposited Se was eliminated with a biological half life of 1.2 days.

What is selenium?

Selenium is mineral that is found in soil and occurs naturally in certain foods (such as whole grains, Brazil nuts, sunflower seeds, and seafood). Selenium is not produced in the body, but it is needed for proper thyroid and immune system function.

How should I take selenium?

If you choose to use selenium, use it as directed on the package or as directed by your doctor, pharmacist, or other healthcare provider.

What should I avoid while taking selenium?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What are the side effects of selenium?

Long term use of high selenium doses can lead to dangerous side effects. Stop taking selenium and call your doctor at once if you have: 1 nausea, vomiting; 2 lack of energy, feeling irritable or very tired 3 hair loss, mild rash, brittle or painful fingernails, or white streaks on the nails; 4 tremors, feeling light-headed; 5 muscle tenderness; 6 flushing (warmth, redness, or tingly feeling); 7 metallic taste, bad breath, strong body odor; or 8 easy bruising or bleeding.

How long before surgery can you stop using Selenium?

If you need surgery, tell the surgeon ahead of time that you are using selenium. You may need to stop using this product for at least 2 weeks before your surgery. This medication can affect the results of certain medical tests. Tell any doctor who treats you that you are using selenium.

Does selenium increase with age?

The recommended dietary allowance of selenium increases with age. Follow your healthcare provider's instructions. You may also consult the National Academy of Sciences "Dietary Reference Intake" or the U.S. Department of Agriculture's "Dietary Reference Intake" (formerly "Recommended Daily Allowances" or RDA) listings for more information.

Can you use selenium for long term?

Warnings. High doses or long-term use of selenium can lead to serious medical problems or death. Do not use more of this product than is recommended on the label. Follow all directions on your medicine label and package.

How many protons does selenium have?

Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. The chemical symbol for Selenium is Se.

How are atomic nuclei determined?

Properties of atomic nuclei (atomic mass, nuclear cross-sections) are determined by the number of protons and number of neutrons (neutron number). It must be noted, especially nuclear cross-sections may vary by many orders from nuclide with the neutron number N to nuclide with the neutron number N+1. For example, actinides with odd neutron number are usually fissile (fissionable with slow neutrons) while actinides with even neutron number are usually not fissile (but are fissionable with fast neutrons). Heavy nuclei with an even number of protons and an even number of neutrons are (due to Pauli exclusion principle) very stable thanks to the occurrence of ‘paired spin’. On the other hand, nuclei with an odd number of protons and neutrons are mostly unstable.

What are the two forces that make up the nucleus?

Atomic nuclei consist of protons and neutrons, which attract each other through the nuclear force, while protons repel each other via the electric force due to their positive charge. These two forces compete, leading to various stability of nuclei. There are only certain combinations of neutrons and protons, which forms stable nuclei.

What is the periodic table?

The periodic table is a tabular display of the chemical elements organized on the basis of their atomic numbers , electron configurations, and chemical properties. The electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. Knowledge of the electron configuration of different atoms is useful in understanding the structure of the periodic table of elements.

What is the atomic radius of Selenium?

The atomic radius of Selenium atom is 120pm (covalent radius).

What is the atomic mass of an atom?

The atomic mass is the mass of an atom. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. The atomic mass is carried by the atomic nucleus, which occupies only about 10 -12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance.

How to determine the stability of an isotope?

To determine the stability of an isotope you can use the ratio neutron/proton (N/Z). Also to help understand this concept there is a chart of the nuclides, known as a Segre chart. This chart shows a plot of the known nuclides as a function of their atomic and neutron numbers. It can be observed from the chart that there are more neutrons than protons in nuclides with Z greater than about 20 (Calcium). These extra neutrons are necessary for stability of the heavier nuclei. The excess neutrons act somewhat like nuclear glue. Only two stable nuclides have fewer neutrons than protons: hydrogen-1 and helium-3.

What are the health conditions that are associated with low selenium levels?

But some health conditions -- such as HIV, Crohn's disease, and others -- are associated with low selenium levels. People who are fed intravenously are also at risk for low selenium. Doctors sometimes suggest that people with these conditions use selenium supplements.

What foods contain selenium?

Good natural food sources of selenium include: 1 Nuts, like Brazil nuts and walnuts 2 Many fresh and saltwater fish, like tuna, cod, red snapper, and herring 3 Beef and poultry 4 Grains

What is the best source of selenium?

Good natural food sources of selenium include: Nuts, like Brazil nuts and walnuts. Many fresh and saltwater fish, like tuna, cod, red snapper, and herring. Beef and poultry.

What fish are in the salt water?

Many fresh and saltwater fish, like tuna, cod, red snapper, and herring

Where is selenium found in 2021?

Medically Reviewed by Melinda Ratini, DO, MS on March 26, 2021. Selenium is a mineral found in the soil. Selenium naturally appears in water and some foods. While people only need a very small amount, selenium plays a key role in their metabolism.

Is Selenium good for asthma?

Selenium has also been studied for the treatment of dozens of conditions. They range from asthma to arthritis to dandruffto infertility. However, the results have been inconclusive.

Does selenium help with cancer?

Evidence that selenium supplements may reduce the odds of prostate cancer has been mixed, but most studies suggest there is no real benefit. Selenium does not seem to affect the risk of colorectal or lung cancer. But beware: some studies suggest that selenium may increase the risk of non- melanoma skin cancer.

Selenium (Se) electron configuration through orbit

Scientist Niels Bohr was the first to give an idea of the atom’s orbit. He provided a model of the atom in 1913. The complete idea of the orbit is given there. The electrons of the atom revolve around the nucleus in a certain circular path. These circular paths are called orbit (shell). These orbits are expressed by n. [n = 1,2,3,4 .

Electron configuration of selenium (Se) through orbital

The German physicist Aufbau first proposed an idea of electron configuration through sub-orbits. The Aufbau method is to do electron configuration through the sub-energy level. These sub-orbitals are expressed by ‘l’.

How to write the orbital diagram for selenium (Se)?

To create an orbital diagram of an atom, you first need to know Hund’s principle and Pauli’s exclusion principle. Hund’s principle is that electrons in different orbitals with the same energy would be positioned in such a way that they could be in the unpaired state of maximum number and the spin of the unpaired electrons will be one-way.

Selenium (Se) excited state electron configuration

Atoms can jump from one orbital to another orbital by excited state. This is called quantum jump. Ground state electron configuration of selenium is 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 4. In the selenium ground-state electron configuration, four electrons of the 4p orbital are located in the 4p x (2), 4p y and 4p z sub-orbitals.

Selenium ion (Se 2-) electron configuration

The electron configuration of selenium shows that the last shell of selenium (Se) has six electrons. Therefore, the valence electrons of selenium are six. The elements that have 5, 6, or 7 electrons in the last shell receive the electrons in the last shell during bond formation. The elements that receive electrons and form bonds are called anions.

FAQs

What is the symbol for selenium? Ans: The symbol for selenium is ‘Se’.

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