Rate of Radioactive Disintegration: The activity of a radioactive element is measured by its rate of change into the daughter element which depends upon the nature of the element and is independent of external factors like temperature, pressure or the state of chemical combination. According to the law of radioactive decay given by Lord Rutherford, “the quantity of a radio element which disintegrates in a unit time (rate of disintegration) is directly proportional to the amount present”. Thus, radioactive disintegration may be regarded as a First-order chemical reaction. Consider a radioactive element A which is disintegrating into another element B … Continue reading Rate of Radioactive Disintegration or Decay (Disintegration Rate)