Question

What relationship can be determined from the following information: . The radioactive isotope iodine 131 has a half-life of 8.1 days and emits 0.8 MeV (milli-electronvolts) of energy . The radioactive isotope phosphorus 32 has a half-life of 14.3 days and emits 1.7 MeV of energy . The radioactive isotope phosphorus 33 has a half-ife of 25.5 days and emits 0.25 MeV of energy . The radioactive isotope sulfur 35 has a half-lfe of 875 days and emits 0.2 MeV of energy Multiple Choice The longer the half-lIfe, the more energy emitted by the particles The longer the hif ife the les energy emited by the porticles O Redotoopes of he same elemen must enst the same amountof energy in their emissions of the same element must emit the same amount of energy in their emissions and decay at the same rate. Adjusted for time, radioisotopes emit the same amount of energy in their emissions Energy and half-life are not directly related.

Answer 1

Answer- option 2) longer the half-life, less energy emitted by the particles.

The above inference can be made from 2 phosphorous radioisotopes. As the Half-life increase, the amount of energy emitted by the radioisotope decreases.