What is meant by the half-life of a radioactive isotope?
CHEMISTRY · Single correct · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear
Problem
What is meant by the half-life of a radioactive isotope?
(a) The time required for the activity of a radioactive sample to fall to 1/e of its initial value.
(b) The time required for the mass of a radioactive sample to decrease by one-half as nuclei decay.
(c) The time required for half of the nuclei in a sample to decay.
(d) The time required for the activity of a radioactive sample to double.