A freshly prepared sample of a certain radioactive isotope has an activity of 10mCi
Channel: Doubtnut
Date: 2020-07-12

A freshly prepared sample of a certain radioactive isotope has an activity of 10mCi. Afte 4.0h its activity is 8.00 mCi.  (a) Find the decay constant and half-life  How many atoms of the isotope were contained in the freshly preapared sample? (c) What is the sample's activity 30.0 h after it is prepared?