The Isotope, Tritium, Has a Half-Life of 12

Multiple Choice

The isotope, tritium, has a half-life of 12.3 years. Assume we have 10 kg of the substance. What will be the disintegration constant (in s−¹) ?

A) 5.6 × 10−²
B) 5.6 × 10⁸
C) 3.2 × 10⁷
D) 1.8 × 10−⁹
E) 1.6 × 10⁶