Atom phosphorus. Medical search. Frequent questions

Structure of white phosphorus. (citizendium.org)
White phosphorus and yellow arsenic both have four atoms arranged in a tetrahedral structure in which each atom is bound to the other three atoms by a single bond. (citizendium.org)
The toxicity of white phosphorus led to its discontinued use in matches. (citizendium.org)
Its density (2.34 kg/L) is higher than that of white phosphorus. (citizendium.org)
White phosphorus (P 4 ) exists as individual molecules made up of four atoms in a tetrahedral arrangement, resulting in very high ring strain and instability. (wikidoc.org)
White phosphorus is a yellow, waxy transparent solid. (wikidoc.org)
White phosphorus is insoluble in water but soluble in carbon disulfide. (wikidoc.org)
Red phosphorus may be formed by heating white phosphorus to 250°C (482°F) or by exposing white phosphorus to sunlight. (wikidoc.org)
Red phosphorus does not catch fire in air at temperatures below 240°C, whereas white phosphorus ignites at about 30°C. (wikidoc.org)
Phosphorus is a highly-reactive non- metallic element (sometimes considered a metalloid) with two primary allotropes, white phosphorus and red phosphorus its black flaky appearance is similar to graphitic carbon . (americanelements.com)
White phosphorus is a toxic substance produced from phosphate-containing rocks. (cdc.gov)
Industries use white phosphorus to manufacture chemicals used in fertilizers, food additives, and cleaning compounds. (cdc.gov)
The military uses white phosphorus in various types of ammunition as an incendiary agent, because it spontaneously catches fire in air. (cdc.gov)
It has a match-like or garlic-like, acrid odor, but do not depend on odor for detection of white phosphorus. (cdc.gov)
Indoor Air: White phosphorus can release into indoor air as smoke. (cdc.gov)
Water: White phosphorus can contaminate water. (cdc.gov)
Food: White phosphorus cannot be used to contaminate food. (cdc.gov)
Outdoor Air: White phosphorus can enter outdoor air as smoke. (cdc.gov)
Agricultural: If white phosphorus releases as smoke, it is unlikely to contaminate agricultural products. (cdc.gov)
However, particles of white phosphorus that do not react with air may contaminate agricultural products. (cdc.gov)
White phosphorus absorbs into the body when inhaled, ingested, or through skin contact. (cdc.gov)
White phosphorus is commonly supplied in chalk-like cylindrical form. (quizlet.com)

Although the phosphorus atom is found in a variety of oxidation states, most of the phosphorus-containing molecules of pharmacological importance possess phosphorus in the form of phosphonate or phosphinate functional groups, or in a major oxidation state as a phosphate group. (conicet.gov.ar)
To follow up this discovery and related future exoplanet biosignature detections, it is important to spectroscopically detect the presence of phosphorus-bearing atmospheric molecules that could be involved in the chemical networks producing, destroying or reacting with phosphine. (frontiersin.org)
We start by enumerating phosphorus-bearing molecules (P-molecules) that could potentially be detected spectroscopically in planetary atmospheres and collecting all available spectral data. (frontiersin.org)
Carbon atoms in alkane molecules are joined by single covalent bonds. (creative-chemistry.org.uk)
These molecules have four pairs of outer electrons around their central atom. (creative-chemistry.org.uk)
Isomers are molecules with the same molecular formula but different arrangements of atoms. (creative-chemistry.org.uk)
And that is why the Ghent-based scientists have now turned to molecules comprising simpler atoms: carbon, hydrogen, nitrogen and oxygen. (deingenieur.nl)
Organisms are alive - their constituent atoms and molecules are not. (bungie.org)
This enzyme acts as a phosphatase, which means that it removes clusters of oxygen and phosphorus atoms (phosphate groups) from other molecules. (medlineplus.gov)
Small but significant differences are observed in the bond angles at phosphorus and in the chelate ring conformations of the two indepen-dent molecules. (degruyter.com)
Atoms tend to combine with other atoms to form molecules (for example, hydrogen and oxygen combine to form water). (cdc.gov)

However, normally method for n-doped Ge film from phosphorus is by mean of using PH 3 gas, which produces tetrahedral phosphorus molecule with low sticking coefficient and the highest doping concentration only obtained in the range of 10 18 - 1 × 10 19 atoms∙cm −3 . (scirp.org)
A quarter of the Sn atoms in the unit cell build up a puck-ered net of six-membered rings, another quarter is bound to the net-atoms forming a tetrahedral Sn coordination. (degruyter.com)
This complex has distorted tetrahedral geometry with two phosphorus atoms from two triphenylphosphine ligands, thione sulfur of thiosemicarbazone ligand and chloride ion occupying the four corners of the tetrahedron. (ias.ac.in)

Phosphorous was first recognized as an element by Hennig Brand in 1669 its name ( phosphorus mirabilis , or "bearer of light") was inspired from the brilliant glow emitted by its distillation. (americanelements.com)
Phosphorus triiodide reacts vigorously with water, producing phosphorous acid (H 3 PO 3 ) and hydroiodic acid (HI), along with smaller amounts of phosphine and P-P compounds. (wikidoc.org)
The element phosphorus and phosphate groups, consisting of phosphorous and oxygen atoms, play an important role in several vital biochemical processes. (nobelprize.org)

The odour of combustion of this form has a characteristic garlic smell, and samples are commonly coated with white "(di) phosphorus pentoxide ", which consists of P 4 O 10 tetrahedra with oxygen inserted between the phosphorus atoms and at their vertices. (wikidoc.org)
By the 18th century it was known that in pure oxygen phosphorus does not glow at all, [8] there is only a range of partial pressure where it does. (wikidoc.org)
Three phosphate units (triphosphate), each made up of one phosphorus atom and four oxygen atoms, are attached to the ribose. (hypertextbook.com)
The chemical formula Fe2O3 represents a compound composed of two iron (Fe) atoms and three oxygen (O) atoms. (proprofs.com)
Its formula is KMnO4, which indicates that it consists of one potassium atom (K), one manganese atom (Mn), and four oxygen atoms (O). The correct answer, KMnO4, represents the correct combination of these elements in the compound. (proprofs.com)

Phosphorus, like nitrogen, is trivalent in this molecule. (citizendium.org)
A multivalent nonmetal of the nitrogen group , phosphorus is commonly found in inorganic phosphate rocks . (wikidoc.org)
The examples on this page are all simple in the sense that they only contain two sorts of atoms joined by single bonds - for example, ammonia only contains a nitrogen atom joined to three hydrogen atoms by single bonds. (chemguide.co.uk)
Organophosphorus compounds having a quaternary nitrogen (ammonium) attached to the phosphorus atom have the highest toxicity. (cdc.gov)
Nitrogen atoms from urate interact with free protons to form uric acid, which is 20 times less soluble than urate and thus more prone to forming crystals. (medscape.com)

The shape of a molecule or ion is governed by the arrangement of the electron pairs around the central atom. (chemguide.co.uk)
There are four copper atoms in the middle of each molecule, surrounded by carbon and phosphorus atoms. (sciencedaily.com)
Radioactive atoms that become part of a molecule do not affect the way the molecule behaves in chemical reactions or inside your body. (cdc.gov)

Both the white and red allotropes of phosphorus are insoluble in water. (citizendium.org)

The most common occurrence of phosphorus in drugs is either in prodrugs or in compounds for which the phosphorus atom plays a role in the biological activity, such as in modified nucleotides, in metabolically stable analogues of metabolites bearing phosphate groups, and as bioisosteric analogues of carboxyl groups. (conicet.gov.ar)
Phosphorus compounds with unique chirality due to the presence of a P-stereocentre are obtained through stereoselective catalytic cross-coupling of phosphoramidites and aryl halides. (nature.com)
A prominent example of such compounds is Remdesivir, a broad-spectrum antiviral drug that features a phosphorus stereocentre and has gained considerable interest during the COVID-19 pandemic. (nature.com)
However, despite the importance of chiral phosphorus compounds, a major disadvantage to their use is that expensive and complicated synthetic routes are needed to access them and stereoselectivity is often poor. (nature.com)
The main reason for this disadvantage is a lack of methodology for the synthesis of phosphorus compounds in which the chirality at the phosphorus atom can be readily controlled during carbon-phosphorus (C-P) bond formation. (nature.com)
We developed a general strategy for preparing chiral phosphorus compounds that have a stereocentre at the phosphorus atom, so called P-chirogenic phosphorus compounds (Fig. 1 ). (nature.com)
The ready access to both mirror image forms (enantiomers) of the starting material and the easy recycling of the BINOL auxiliary group adds to the practicality of our method for generating P-chirogenic phosphorus compounds. (nature.com)
Importantly, we found that a range of P-chirogenic phosphorus compounds and their derivatives can be synthesized as virtually single enantiomers. (nature.com)
The flexibility of the method is demonstrated by the fact that distinct stereoisomers of chiral phosphorus compounds can be formed by simply changing the order of steps in the synthetic sequence. (nature.com)
We have developed a general, divergent and highly stereoselective route for synthesizing phosphorus compounds with a P-stereocentre. (nature.com)

Elemental phosphorus can exist in several allotropes , most commonly white, red and black. (wikidoc.org)
Elemental phosphorus is then liberated as a vapour and can be collected under phosphoric acid . (wikidoc.org)

This process is similar to the first synthesis of phosphorus from calcium phosphate in urine. (wikidoc.org)
[3] [4] A recent synthesis of black phosphorus using metal salts as catalysts has been reported. (wikidoc.org)
Fig: 1(A) Structure of black phosphorus, (B) Synthesis methods of black phosphorus. (databasefootball.com)

You can do this by drawing dots-and-crosses pictures, or by working out the structures of the atoms using electrons-in-boxes and worrying about promotion, hybridisation and so on. (chemguide.co.uk)
Write down the number of electrons in the outer level of the central atom. (chemguide.co.uk)
This allows for the electrons coming from the other atoms. (chemguide.co.uk)
Pure silicon has four valence electrons that it shares with four neighbouring atoms. (scienceinschool.org)
Adding impurities with more or fewer valence electrons (such as phosphorus or boron) modifies the conductivity properties of the material. (scienceinschool.org)
Phosphorus has five valence electrons and, when a phosphorus atom is surrounded by silicon atoms, the fifth electron is only loosely bound. (scienceinschool.org)
Phosphorus-doped silicon is called n-type (negative type) since doping increases the number of negative free charges (electrons). (scienceinschool.org)
Quantum computers use traits of particles like atoms and electrons to compute, and are theoretically many orders of magnitude faster than today's computers in solving very large problems, including the number-factoring problems whose complexity underpins today's computer security software. (trnmag.com)
An atom consists of one nucleus, made of protons and neutrons, and many smaller particles called electrons. (cdc.gov)
Beta particles are high-energy electrons that are emitted from the nuclei of unstable atoms (eg, cesium-137, iodine-131). (msdmanuals.com)

Has 1 halo proton 32P is a radioactive isotope of phosphorus with relative atomic mass 31.973907 and half-life of 14.26 days. (wikipedia.org)
32P is a radioactive isotope of phosphorus with beta particle-emitting radiocytotoxic activity. (wikipedia.org)

TNSALP is essential for the process of mineralization, in which minerals such as calcium and phosphorus are deposited in developing bones and teeth. (medlineplus.gov)
The chemical formula CaS represents calcium sulfide, which is a compound made up of one calcium atom and one sulfur atom. (proprofs.com)

2015). Among the three isotopes of phosphorus, a new 2D material known as black phosphorus (BP) has gained spectacular status in the scientific world recently, owing to its unique layered structure and layer-dependant properties. (databasefootball.com)

Phosphorus and arsenic share many chemical properties. (citizendium.org)
Both phosphorus and arsenic have many [[allotrope]]s, but only the white and red forms predominate. (citizendium.org)
You start by vaporising ultra-pure source materials like gallium, aluminium or indium, and combine them with the likes of arsenic or phosphorus. (theconversation.com)

If you are given a more complicated example, look carefully at the arrangement of the atoms before you start to make sure that there are only single bonds present. (chemguide.co.uk)
You know how many bonding pairs there are because you know how many other atoms are joined to the central atom (assuming that only single bonds are formed). (chemguide.co.uk)
Also, crystals naturally consist of atoms which form bonds in all three directions. (theconversation.com)
This means there are always unsatisfied atoms with "dangling" bonds at the edges. (theconversation.com)
In a perfect graphene crystal, all the atoms are completely bonded to one another and there are no dangling bonds. (theconversation.com)

Creative Chemistry has molecular models of phosphorus pentafluoride, sulfur tetrafluoride and chlorine trifluoride. (creative-chemistry.org.uk)
The chemical formula P2Cl5 indicates that there are two phosphorus atoms and five chlorine atoms in the compound. (proprofs.com)

Phosphorus , ( Template:IPAEng , Template:Lang-el meaning "light", and phoros meaning "bearer"), is the chemical element that has the symbol P and atomic number 15. (wikidoc.org)
The phosphorus atom has an NMR chemical shift of 178 ppm (downfield of H 3 PO 4 ). (wikidoc.org)
Also very toxic are those containing an attached fluorine atom (This includes the chemical warfare nerve agents). (cdc.gov)
The chemical formula AuP indicates a compound composed of gold and phosphorus. (proprofs.com)

The correct answer, "Gold (III) phosphide," suggests that the gold in the compound is in its +3 oxidation state, while phosphide refers to the phosphorus ion with a -3 charge. (proprofs.com)
The number of ligand atoms to which the metal center is directly bonded is the metal cation's coordination number, and this number is always greater than the regular valence or oxidation number of the metal. (bvsalud.org)

They collide with the nuclei of stable atoms, resulting in the emission of energetic protons, alpha and beta particles, and gamma radiation. (msdmanuals.com)

Although the molecular formula suggests the name tetraphosphorus hexoxide, the name phosphorus trioxide preceded the knowledge of the compound's molecular structure, and its usage continues today. (toppr.com)

Black phosphorus is made of even larger aggregates and is the least reactive allotrope. (citizendium.org)
Black phosphorus has an orthorhombic structure (C mca ) and is the least reactive allotrope, it consists of many six-membered rings which are interlinked. (wikidoc.org)
The enzymes help ferry a small, reactive cluster of atoms containing phosphorus - called a phosphoryl group - to cell proteins. (sciencedaily.com)

Divide by 2 to find the total number of electron pairs around the central atom. (chemguide.co.uk)
It is shown that activated electron concentration up to 2 × 10 19 atoms∙cm −3 can be obtained confirming by both Hall effect measurement and band gap narrowing phenomenon. (scirp.org)
Moreover, we observed isolated I atoms in atomically resolved transmission electron microscopy, which proves the production of monoiodide. (osti.gov)

The glow from phosphorus was the attraction of its discovery around 1669, but the mechanism for that glow was not fully described until 1974. (wikidoc.org)

In 1865 Hittorf discovered that when phosphorus was recrystallized from molten lead , a red/purple form is obtained. (wikidoc.org)

The fluorine atom has a covalent radius of 64 pm and its Van der Waals radius is 135 pm. (americanelements.com)

For post-silicon electronics, engineers have been doubling down on research aimed at making transistors from atoms-thick two-dimensional materials. (ieee.org)

Phosphorus triiodide is commonly used in the laboratory for the conversion of primary or secondary alcohols to alkyl iodides . (wikidoc.org)

It has the cubic structure typical for metal hexaborides, with octahedral units of 6 boron atoms. (mis-asia.com)

further heating results in the red phosphorus becoming crystalline. (wikidoc.org)

The copper atom has a radius of 128 pm and a Van der Waals radius of 186 pm. (americanelements.com)

[3] Often the PI 3 is made in situ by the reaction of red phosphorus with iodine in the presence of the alcohol. (wikidoc.org)
Charge per iodine atom for monoiodide ion or iodine atom at end of iodine chain is significantly higher than that for I 2 . (osti.gov)

For example, an atom with one proton is hydrogen and an atom with 27 protons is cobalt. (cdc.gov)
The number of protons in an atom of a particular element is always the same, but the number of neutrons may vary. (cdc.gov)
Neutrons add to the weight of the atom, so an atom of cobalt that has 27 protons and 32 neutrons is called cobalt-59 because 27 plus 32 equals 59. (cdc.gov)

The phosphorus atom has a radius of 110.5.pm and its Van der Waals radius is 180.pm. (americanelements.com)
The iridium atom has a radius of 136 pm and a Van der Waals radius of 202 pm. (americanelements.com)
This binding sites where shown within 5.0 Angstroms radius around Phosphorus atom. (atomistry.com)

Creative Chemistry has molecular models of unbranched alkenes with 2, 3 or 4 carbon atoms. (creative-chemistry.org.uk)
Creative Chemistry has molecular models of simple alcohols with 1 to 4 carbon atoms. (creative-chemistry.org.uk)

Template:Chembox new Phosphorus triiodide (PI 3 ) is an unstable red solid which reacts violently with water. (wikidoc.org)

Only lead and bismuth (of the relevant metals to this topic, afaik) refuse under all conditions to combine with phosphorus. (sciencemadness.org)

Stereoisomerism occurs when substances have the same molecular formula, but a different arrangement of their atoms in space. (creative-chemistry.org.uk)

One of the forms of red/black phosphorus is a cubic solid. (wikidoc.org)
To develop the technology, we used a material called black phosphorus, with a slightly deformed molecular structure due to missing atoms. (cosmosmagazine.com)
Lu and his colleagues solved the problem with Scotch tape from the local office supplies store, which they applied to a crystal of black phosphorus. (iflscience.com)

The vaporised atoms fly through a vacuum chamber towards a base layer made of similar materials. (theconversation.com)

Phosphorus (atomic symbol: P, atomic number: 15) is a Block P, Group 15, Period 3 element. (americanelements.com)
The atoms stick to it and slowly build up a crystal one atomic layer at a time. (theconversation.com)

The most important commercial use of phosphorus-based chemicals is the production of fertilisers . (wikidoc.org)

It also requires phosphorus, which is even more scarcely available than silicon. (deingenieur.nl)
A University of Melbourne led team has perfected a technique for embedding single atoms in a silicon wafer one-by-one. (nanomelbourne.com)
Until now, implanting atoms in silicon has been a haphazard process. (nanomelbourne.com)
A silicon chip gets showered with phosphorus which implant in a random pattern, like raindrops on a window. (nanomelbourne.com)
We embedded phosphorus ions, precisely counting each one, in a silicon substrate creating a qubit "chip", which can then be used in lab experiments to test designs for large scale devices," lead author Professor David Jamieson of The University of Melbourne explained. (nanomelbourne.com)
The team drilled a tiny hole in an AFM cantilever, so that when it was showered with phosphorus atoms one would occasionally drop through the hole and embed in the silicon substrate. (nanomelbourne.com)

This purple form is sometimes known as "Hittorf's phosphorus. (wikidoc.org)
In addition, a fibrous form exists with similar phosphorus cages. (wikidoc.org)
These display an approximate mirror plane perpendicular to the chelate rings, which are in the boat form with P and C(3) displaced from the plane of the remaining ring atoms. (degruyter.com)

This method won't work without some modification for many ions containing metals, and no simple method gives reliable results where the central atom is a transition metal. (chemguide.co.uk)

Neutral or negatively charged ligands bonded to metal cations or neutral atoms. (bvsalud.org)

as such, phosphorus is considered a monoisotopic element. (wikipedia.org)
periodic table]], phosphorus is never found as a pure element in nature, but only in combination with other elements. (citizendium.org)
Due to its high reactivity, phosphorus is never found as a free element in nature. (wikidoc.org)
Phosphorus is a component of DNA and RNA and an essential element for all living cells . (wikidoc.org)
Like graphene, BP has a single element layered structure consisting of phosphorus atoms (Fig: 1A). (databasefootball.com)

Key to the success of our approach is the axial-to-central transfer of chirality from the BINOL structure to the phosphorus atom during the catalytic cross-coupling event. (nature.com)

Chain isomers have the same molecular formula, but the way their carbon atoms are joined together differs from isomer to isomer. (creative-chemistry.org.uk)

Anatomy6

Organisms6

Diseases13

Chemicals and Drugs44

Analytical, Diagnostic and Therapeutic Techniques and Equipment8

Phenomena and Processes17

Disciplines and Occupations1

Technology, Industry, Agriculture6

Information Science1

Health Care6

White phosphorus22

Molecules11

Tetrahedral3

Phosphorous3

Oxygen5

Nitrogen5

Molecule3

Insoluble in water1

Compounds10

Elemental phosphorus2

Synthesis3

Electrons10

Radioactive isotope2

Calcium2

Isotopes1

Arsenic3

Bonds5

Chlorine2

Chemical4

Oxidation2

Particles1

Tetraphosphorus1

Reactive3

Electron3

16691

Hittorf1

Fluorine atom1

Transistors1

Commonly1

Boron1

Crystalline1

Copper1

Iodine2

Protons3

Radius3

Chemistry2

Unstable1

Combine1

Arrangement1

Black3

Made1

Atomic2

Chemicals1

Silicon6

Form3

Central atom1

Metal1

Element5

Structure1

Molecular formula1