Science Homework Help
Science Homework Help. half life ,am stuck
Potassium-40
decays into argon-40 with a half-life of 1.2 billion years. A particular
mineral grain is known to have had a million potassium atoms in its crystal
structure when it formed. When the grain was ground up, scientists discovered
750,000 atoms of argon-40. When did the grain form?
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