Argon-40 is a stable isotope with 18 protons and 22 neutrons. Radiogenic argon-40 accumulated from potassium-40 is a daughter product used in potassium-argon dating.

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  1. Argon
  2. Noble gas
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Argon-40 by Ciro Santilli 40 Created 2024-07-04 Updated 2025-07-16
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