Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Atomic_number> ?p ?o. }
Showing items 1 to 40 of
40
with 100 items per page.
- Atomic_number abstract "In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons.The atomic number, Z, should not be confused with the mass number, A, which is the number of nucleons, the total number of protons and neutrons in the nucleus of an atom. The number of neutrons, N, is known as the neutron number of the atom; thus, A = Z + N (these quantities are always whole numbers). Since protons and neutrons have approximately the same mass (and the mass of the electrons is negligible for many purposes) and the mass defect of nucleon binding is always small compared to the nucleon mass, the atomic mass of any atom, when expressed in unified atomic mass units (making a quantity called the "relative isotopic mass,") is roughly (to within 1%) equal to the whole number A.Atoms with the same atomic number Z but different neutron numbers N, and hence different atomic masses, are known as isotopes. A little more than three-quarters of naturally occurring elements exist as a mixture of isotopes (see monoisotopic elements), and the average isotopic mass of an isotopic mixture for an element (called the relative atomic mass) in a defined environment on Earth, determines the element's standard atomic weight. Historically, it was these atomic weights of elements (in comparison to hydrogen) that were the quantities measurable by chemists in the 19th century.The conventional symbol Z comes from the German word Zahl meaning number/numeral/figure, which, prior to the modern synthesis of ideas from chemistry and physics, merely denoted an element's numerical place in the periodic table, whose order is approximately, but not completely, consistent with the order of the elements by atomic weights. Only after 1915, with the suggestion and evidence that this Z number was also the nuclear charge and a physical characteristic of atoms, did the word Atomzahl (and its English equivalent atomic number) come into common use in this context.".
- Atomic_number thumbnail Atomic_number_depiction.jpg?width=300.
- Atomic_number wikiPageID "673".
- Atomic_number wikiPageRevisionID "606200694".
- Atomic_number hasPhotoCollection Atomic_number.
- Atomic_number subject Category:Atoms.
- Atomic_number subject Category:Chemical_properties.
- Atomic_number subject Category:Nuclear_physics.
- Atomic_number comment "In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element.".
- Atomic_number label "Atomic number".
- Atomic_number label "Atoomnummer".
- Atomic_number label "Liczba atomowa".
- Atomic_number label "Numero atomico".
- Atomic_number label "Numéro atomique".
- Atomic_number label "Número atómico".
- Atomic_number label "Número atómico".
- Atomic_number label "Ordnungszahl".
- Atomic_number label "Зарядовое число".
- Atomic_number label "عدد ذري".
- Atomic_number label "原子序数".
- Atomic_number label "原子番号".
- Atomic_number sameAs Atomové_číslo.
- Atomic_number sameAs Ordnungszahl.
- Atomic_number sameAs Ατομικός_αριθμός.
- Atomic_number sameAs Número_atómico.
- Atomic_number sameAs Atomo-zenbaki.
- Atomic_number sameAs Numéro_atomique.
- Atomic_number sameAs Nomor_atom.
- Atomic_number sameAs Numero_atomico.
- Atomic_number sameAs 原子番号.
- Atomic_number sameAs 원자_번호.
- Atomic_number sameAs Atoomnummer.
- Atomic_number sameAs Liczba_atomowa.
- Atomic_number sameAs Número_atómico.
- Atomic_number sameAs m.0hwy.
- Atomic_number sameAs Q23809.
- Atomic_number sameAs Q23809.
- Atomic_number wasDerivedFrom Atomic_number?oldid=606200694.
- Atomic_number depiction Atomic_number_depiction.jpg.
- Atomic_number isPrimaryTopicOf Atomic_number.