Question

Calculate the percent activity of the radioactive isotope iridium-192 remaining after two half-lives. activity:

Answer 1

no. af hal ivet n) 2 (x 100 ()x100 100 = 25 y for inidium1g2 geven actrity counts(activity) of fossil with c-14 activi ty f ive tree with c4 of half lives 160 40 5730 years 4 halt lives 1 C-14 halt ife 1 fe of fossil = 229 20 year 4X 57 30 The steam is generated by heat oreated by oft-o Nuclear Hision ) Example of nuclear Fusion opt - He +'n (v) 263 98 106 4n = 106-98 atomic no. of missi ng element 7ts mas (263 +4) -249 = 18 element (nuclew)is 18 235 131 52 (5 +40 92 (137+ 97+2) no. of neutrons 235 236-235 1 11