Isotope P has a half-life of 2 years

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

Problem

Isotope P has a half-life of 2 years, while isotope Q has a half-life of 5 years. Which of the following correctly compares their decay constants

k_P

and

k_Q

? (a)

|k_P| < |k_Q|

(b)

k_P = -k_Q

(c)

|k_P| > |k_Q|

(d)

|k_P| = \dfrac{2}{5}\,|k_Q|