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)?

Question

Quizplus · Accepted Answer

The disintegration constant can be found using the formula: 
$\lambda = \frac{0.693}{t_{1/2}}$
Substituting the given values, we get:
$\lambda = \frac{0.693}{12.3	ext{ years}} \cdot \frac{1 	ext{ year}}{3.1536 \cdot 10^7 	ext{ s}} = 1.843 \cdot 10^{-19} 	ext{ s}^{-1}$
Therefore, the answer is D: 1.8 × 10−19 s−1.

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