If N_0 is the initial number of nuclei, number of nuclei remaining undecayed at the end of n^th half — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

At the end of each half-life, the number of undecayed active nuclei is halved. After n half-lives, the remaining number of active nuclei is N = N_0 * (1/2)^n = N_0 * 2^-n.