unit:E_h

rdf:type: qudt:Unit
PredicateObject
rdf:type qudt:Unit
dcterms:description <p>The \(\textit{Hartree}\) (symbol: \(E_h\) or \(Ha\)), also known as the \(\text{Hartree\,Energy}\), is the atomic unit of energy. The hartree energy is equal to the absolute value of the electric potential energy of the hydrogen atom in its ground state. The energy of the electron in an H-atom in its ground state is \(-E_H\), where \(E_H= 2 R_\infty \cdot hc_0\). The 2006 CODATA recommended value was \(E_H = 4.35974394(22) \times 10^{-18} J = 27.21138386(68) eV\).</p> <dl> <dt class="size-14">Definition:</dt> <dd>\(E_H= \frac{e^2}{4\pi \epsilon_0 a_0 }\)<br/> where, \(e\) is the elementary charge, \(\epsilon_0\) is the electric constant, and \(a_0\) is the Bohr radius.'</dd> </dl>
qudt:applicableSystem
qudt:conversionMultiplier 0.00000000000000000435974394
qudt:conversionMultiplierSN 4.35974394E-18
qudt:dbpediaMatch http://dbpedia.org/resource/Hartree
qudt:hasDimensionVector qkdv:A0E0L2I0M1H0T-2D0
qudt:hasQuantityKind quantitykind:Energy
qudt:informativeReference http://en.wikipedia.org/wiki/Hartree?oldid=489318053
qudt:scalingOf unit:J
qudt:symbol “Ha”
qudt:wikidataMatch http://www.wikidata.org/entity/Q476572
rdfs:isDefinedBy http://qudt.org/3.1.10/vocab/unit
rdfs:label
  • “Hartree”
  • “Hartree”@en
Generated 2026-01-15T09:02:43.260-05:00