The age of very ancient rocks and the Earth itself is typically estimated using a radiometric dating — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

Uranium-Lead dating is used for geological timescales. Long-lived Uranium-238 ($T_{1/2} = 4.5 \times 10^9\text{ years}$) decays over billions of years into stable Lead-206. Comparing their current amounts yields the age of the mineral.