Question

Q.1It is a radioactive substance.
Q.2It is the basis of modern civilization.​

Answer 1

Answer:

Definition. The decay constant (symbol: λ and units: s−1 or a−1) of a radioactive nuclide is its probability of decay per unit time. The number of parent nuclides P therefore decreases with time t as dP/P dt = −λ. ... The decay constant relates to the half-life of the nuclide T 1/2 through T 1/2 = ln 2/λ.