@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t10-19.2>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "10-19.2" ;
  skosxl:prefLabel "electron radius"@en ;
  skosxl:altLabel "r_\"e\""@en ;
  skos:definition "radius of a sphere such that the relativistic electron energy is distributed uniformly:\n\n[stem%unnumbered]\n++++\nr_\"e\" = (e^2)/(4pi epsilon_0 m_\"e\" c_0^2)\n++++\n\nwhere\n\nstem:[e]:: is the elementary charge (<<iso80000-1>>),\nstem:[epsilon_0]:: is the electric constant (<<iec80000-6>>),\nstem:[m_\"e\"]:: is the rest mass (<<t10-2>>) of electron, and\nstem:[c_0]:: is the speed of light in vacuum (<<iso80000-1>>)\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-10> ;
  isq:hasUnit [
    skos:notation "m" ;
    skosxl:prefLabel "metre"@en
  ] ;
  skos:note "This quantity corresponds to the electrostatic energy stem:[E] of a charge distributed inside a sphere of radius stem:[r_\"e\"] as if all the rest energy (<<t10-3>>) of the electron were attributed to the energy of electromagnetic origin, using the relation stem:[E=m_\"e\"c_0^2]."@en ;
  iso:urn <urn:iso:std:iso:80000:-10:ed-2:en:item:10-19.2> .