• Jul 5, 2026 isotopic pennies lab answer key tivity? The purpose of the 'Isotopic Pennies' lab is to understand isotopic composition and how isotopic ratios can be used to identify different samples or sources, often through analyzing the ratios of isotopes like C-12 and C-13 in pennies. How do you calculate the isotopic ratio in the pennies l By Gabriella Kling
