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blackhorse41Lv1
11 Dec 2019
How many half-lives have passed if a rock contains 25% parent isotopes and 75% daughter isotopes?
How many half-lives have passed if a rock contains 25% parent isotopes and 75% daughter isotopes?
dcht24111997Lv10
16 Apr 2023
12 Feb 2023
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17 Dec 2022
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experttutorLv10
26 Nov 2022
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gloryolalere280Lv10
27 Oct 2022
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Collen VonLv2
28 Mar 2020
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