See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Initial moles of 6 238 68 10 U x 238     Moles of 238 U decayed in three half-lives 7 x 8  In decay from 238 U to 206 Pb , each 238 U atom decays and produces 8 -particles and hence, total number of -particles emitted out A 7 x 8 N 8          6 23 68 10 7