Assertion: argon's isotope | /r/HasProperty | 40k
Facets:
Source sentences:
text: Radiogenic 40Ar is produced (along with 40Ca) by decay of a minor isotope of potassium (40K), which has a total half-life of 1.26(1)
text: Potassium occurs in two stable isotopes (41K and 39K) and one radioactive isotope (40K).