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In geochemistry, geophysics and nuclear physics, primordial nuclides, also known as primordial isotopes, are nuclides found on Earth that have existed in their current form since before Earth was formed. Primordial nuclides were present in the interstellar medium from which the solar system was formed, and were formed in, or after, the Big Bang, by nucleosynthesis in stars and supernovae followed by mass ejection, by cosmic ray spallation, and potentially from other processes. They are the stable nuclides plus the long-lived fraction of radionuclides surviving in the primordial solar nebula through planet accretion until the present; 286 such nuclides are known.

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  • نويدة ابتدائية (ar)
  • Element primordial (ca)
  • Primordiales Nuklid (de)
  • Nucléide primordial (fr)
  • Nuklida primordial (in)
  • Elementi primordiali (it)
  • Primordial nuclide (en)
  • Nuclídeo primordial (pt)
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  • En géochimie et en physique nucléaire, un nucléide primordial, ou isotope primordial, est un nucléide présent sur Terre depuis sa formation. On en connaît 288 (le caractère primordial est discuté pour deux d'entre eux, 146Sm et 244Pu). Parmi eux, 252 sont des nucléides stables, les 36 autres sont radioactifs avec une demi-vie suffisamment longue pour avoir survécu depuis la formation de la Terre. (fr)
  • In geochemistry, geophysics and nuclear physics, primordial nuclides, also known as primordial isotopes, are nuclides found on Earth that have existed in their current form since before Earth was formed. Primordial nuclides were present in the interstellar medium from which the solar system was formed, and were formed in, or after, the Big Bang, by nucleosynthesis in stars and supernovae followed by mass ejection, by cosmic ray spallation, and potentially from other processes. They are the stable nuclides plus the long-lived fraction of radionuclides surviving in the primordial solar nebula through planet accretion until the present; 286 such nuclides are known. (en)
  • Dalam bidang geokimia dan geofisika nuklir, nuklir primordial, yang juga dikenal sebagai isotop primordial, adalah nuklida yang ditemukan di Bumi yang ada dalam bentuk sekarangnya sejak sebelum . Nuklida primordial adalah residu dari Ledakan Besar, dari sumber-sumber kosmogenik dan dari ledakan-ledakan yang terjadi sebelum pembentukan Tata Surya. (in)
  • Em geoquímica e física nuclear, nuclídeos primordiais ou isótopos primordiais são os nuclídeos que se encontram na Terra e que existem no seu estado atual desde um período anterior à formação da Terra. Os nuclídeos primordiais são resíduos do Big Bang, de fontes cosmogénicas e de antigas explosões de supernovas que ocorreram antes da formação do Sistema Solar. São conhecidos 288 destes elementos. (pt)
  • النويدة الابتدائية في الجيوكيمياء والفيزياء النووية عبارة عن نويدات وجدت على سطح الأرض في شكلها الحالي وذلك قبل تشكلها، أي أن عمر النصف لها أكبر من عمر الأرض، وهي عبارة بقايا الانفجار العظيم ومن نويدات ذات أصل كوني ومن انفجارات تخليق المستعر الأعظم النووي والتي حدثت قبل تشكل النظام الشمسي، وهي نويدات مستقرة. إن كل من النويدات المستقرة التي عددها 254 هي نويدات ابتدائية، بالإضافة إلى 34 نويدة لها عمر نصف كبير لدرجة كافية بقيت منذ تشكل الأرض. إن أقل النويدات الابتدائية عمراً هي النظائر 232Th و 238U و 40K و 146Sm و 244Pu، أما أطولها فهو 92Nb بعمر نصف 3.47×107 سنة. (ar)
  • En geoquímica, els elements primordials són els elements químics que existeixen en la seva forma actual des d'abans de la formació del planeta Terra, segons la teoria acceptada de l'evolució estel·lar. Això implica que el període de semidesintegració de determinats àtoms ha de ser superior a 108 anys. Tots els elements estables són primordials, com alguns elements radioactius com el tori (derivat del tori-232) i l'urani. (ca)
  • Ein Radionuklid bezeichnet man als primordial (lat. „von erster Ordnung“), wenn es schon bei der Entstehung der Erde vorhanden war und noch nicht vollständig zerfallen ist. Es kommt daher in der Natur vor, ohne dass es durch natürliche oder technische Prozesse nachgeliefert wurde. Die Bezeichnung „primordiales Radionuklid“ wird meist zu „primordiales Nuklid“ verkürzt. In manchen Nuklidkarten sind die primordialen Radionuklide besonders gekennzeichnet, z. B. in der Karlsruher Nuklidkarte durch einen schwarzen Balken oben in ihrem farbigen Feld. (de)
  • Gli elementi primordiali sono, in geochimica, gli elementi chimici che esistono nella loro forma attuale da prima della formazione del pianeta terra, secondo l'accettata teoria dell'evoluzione stellare. Ciò implica che l'emivita dei determinati atomi deve essere più grande di 108 anni. Tutti gli elementi stabili sono primordiali, come anche alcuni elementi radioattivi come il torio (derivato dal torio-232), e l'uranio. (it)
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