Two radioactive nuclides

CHEMISTRY · Single correct · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear

Problem

Two radioactive nuclides,

P

and

Q

, have decay constants

\lambda_P = 4.0\times10^{-4}\,\text{s}^{-1}

and

\lambda_Q = 1.0\times10^{-4}\,\text{s}^{-1}

respectively. Which nuclide has the longer half-life? (a)

P

(b) Both have the same half-life (c)

Q

(d) Cannot be decided from the given data