ⓘ Chemistry - Europium, Hydrogen, Neon, Atom, Fire, Molecule, Nobel Prize in Chemistry, Physical chemistry, Organic chemistry, Quantum chemistry, Krypton ..

Europium

Europium is a chemical element wi the seembol Eu an atomic nummer 63. It is named efter the continent Europe. It is a moderately haird, sillery metal whilk readily oxidizes in air an watter. Bein a teepical member o the lanthanide series, europium uisually assumes the oxidation state +3, but the oxidation state +2 is common an aa: aw europium compoonds wi oxidation state +2 are slichtly reducing. Europium haes na signeeficant biological role an is relatively non-toxic compared tae ither hivy metals. Maist applications o europium exploit the phosphorescence o europium compoonds.

Hydrogen

Hydrogen is the least wechtie atom in the universe, wi the atomic nummer o 1. It haes the seembol H, an a atomic wecht o 1.007 94 u. Hydrogen is aften lik tae burn an gin it burns in air, it jynes wi oxygen tae mak watter. Hydrogen gas H2 wis first made bi human haunds in the 16t century frae the kirnin o metals wi strang acids. In 1766-1781, Henry Cavendish wis the first ane ti ken that hydrogen gas is a discreet thing. Yin o the ideas for replacin motor fuel is tae uise hydrogen insteid, sin fuel maks orra gasses whan it burns, but hydrogen juist maks watter. Acause o this, we caw the el ...

Neon

Neon is a chemical element wi seembol Ne an atomic nummer 10. It is in group 18 o the periodic table. Neon is a colourless, odorless, inert monatomic gas unner staundart condeetions, wi aboot twa-thirds the density o air. It wis discovered in 1898 as ane o the three residual rare inert elements remainin in dry air, efter nitrogen, oxygen, argon an carbon dioxide are removed. Neon wis the seicont o thir three rare gases tae be discovered, an wis immediately recognised as a new element frae its bricht reid emission spectrum. The name neon is derived frae the Greek wird, νέον, neuter singular ...

Atom

An atom is the smawest consteetuent unit o ordinary matter that haes the properties o a chemical element. Ivery solit, liquid, gas, an plasma is componed o neutral or ionised atoms. Atoms are very smaw; teepical sizes are aroond 100 picometres. Atoms are smaw eneuch that attemptin tae predict thair behaviour uisin clessical physics - as if thay war billiard baws, for ensaumple - gies noticeably incorrect predictions due tae quantum effects. Throu the development o physics, atomic models hae incorporatit quantum principles tae better expleen an predict the behaviour. Ivery atom is componed ...

Fire

Fire is a phenomenon o combustion kythd in strang heat an licht in the furm o a lowe or flames. The wird fire whan uisd wi an indefinit artikil is forordnar uisd ti deskrive aither a fuel in a state o combustion or an instance o veilent, destructive an uncontrold burnin (sic as a wildfire an fires in biggins an vehicles.

Molecule

A molecule is an electrically neutral group o twa or mair atoms held thegither bi chemical bonds. Molecules are distinguished frae ions bi thair lack o electrical chairge. Houever, in quantum physics, organic chemistry, an biochemistry, the term molecule is eften uised less strictly, bein appleed tae polyatomic ions an aa. In the kinetic theory o gases, the term molecule is eften uised for ony gaseous pairticle regairdless o its composeetion. Accordin tae this defineetion, noble gas atoms are conseedert molecules as thay are in fact monoatomic molecules. A molecule mey be homonuclear, that ...

                                     

ⓘ Chemistry

  • interacts ti mak molecules an the wey molecules interacts wi ilk ither. Chemistry is sometimes called the central science because it bridges other Natural
  • Prize in Chemistry Swadish: Nobelpriset i kemi is awairdit annually bi the Ryal Swadish Academy o Sciences tae scientists in sindry fields o chemistry
  • Physical chemistry is the study o macroscopic, atomic, subatomic, an pairticulate phenomena in chemical systems in terms o laws an concepts o physics
  • Organic chemistry is a chemistry subdiscipline involvin the scientific study o the structur, properties, an reactions of organic compoonds an organic materials
  • Quantum chemistry is a branch o chemistry whase primary focus is the application o quantum mechanics in pheesical models an experiments o chemical seestems
  • Inorganic chemistry deals wi the seenthesis an behaviour o inorganic an organometallic compoonds.
  • In chemistry a radical mair precisely, a free radical is an atom, molecule, or ion that haes unpaired valence electrons. Wi some exceptions, thir unpaired
  • pressur. Internaitional Union o Pure an Applee d Chemistry 2005 Nomenclature o Inorganic Chemistry IUPAC Recommendations 2005 Cambridge UK RSC IUPAC
  • weights of the elements 2013 IUPAC Technical Report Pure and Applied Chemistry 88 3 265 91. doi: 10.1515 pac - 2015 - 0305. Cite uses deprecated parameter
  • weights of the elements 2013 IUPAC Technical Report Pure and Applied Chemistry 88 3 265 91. doi: 10.1515 pac - 2015 - 0305. Cite uses deprecated parameter
                                     

Nobel Prize in Chemistry

The Nobel Prize in Chemistry is awairdit annually bi the Ryal Swadish Academy o Sciences tae scientists in sindry fields o chemistry.

                                     

Physical chemistry

Physical chemistry is the study o macroscopic, atomic, subatomic, an pairticulate phenomena in chemical systems in terms o laws an concepts o physics. Template:Stub/science

                                     

Organic chemistry

Organic chemistry is a chemistry subdiscipline involvin the scientific study o the structur, properties, an reactions of organic compoonds an organic materials, i.e., matter in its sindry forms that contain carbon atoms.

                                     

Quantum chemistry

Quantum chemistry is a branch o chemistry whase primary focus is the application o quantum mechanics in pheesical models an experiments o chemical seestems.

                                     

Radical (chemistry)

In chemistry, a radical is an atom, molecule, or ion that haes unpaired valence electrons. Wi some exceptions, thir unpaired electrons mak free radicals heichly chemically reactive taewart ither substances, or even taewart themsels: thair molecules will eften spontaneously dimerise or polymerise if thay come in contact wi ilk ither. Maist radicals are raisonably stable anly at very law concentrations in inert media or in a vacuum.

                                     

Krypton

Krypton is a chemical element wi seembol Kr an atomic nummer 36. It is a member o group 18 elements. A colourless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolatit bi fractionally distillin liquified air, an is eften uised wi ither rare gases in fluorescent lamps. Krypton is inert for maist practical purposes.

                                     

Phosphorus

Phosphorus is a nonmetallic chemical element wi seembol P an atomic nummer 15. A multivalent pnictogen, phosphorus as a mineral is almaist always present in its maximally oxidised state, as inorganic phosphate rocks. Elemental phosphorus exists in twa major forms - white phosphorus an reid phosphorus - but due tae its heich reactivity, phosphorus is never foond as a free element on Yird.

                                     

Airsenic

Airsenic is a chemical element wi symbol As an atomic nummer 33. Airsenic occurs in mony minerals, uisually in conjunction wi sulfur an metals, an aa as a pure elemental crystal. It wis first documentit bi Albertus Magnus in 1250. Airsenic is a metalloid. It can exist in sindry allotropes, altho anly the gray furm haes important uise in industry.

                                     

Chemical substance

In chemistry, a chemical substance is a furm o matter that haes constant chemical composeetion an characteristic properties. It cannae be separatit intae components bi pheesical separation methods, i.e. wioot breakin chemical bonds. It can be solid, liquid, gas, or plasma.