Chapter 1, Problem 4P

Hydrogen possesses three isotopes, but tritium $\left(\text{H}\right)$, which is radioactive, occurs as less than 1 in ${10}^{17}$ atoms in a sample of natural hydrogen. If the value of ${\text{A}}_{\text{r}}$ for hydrogen is 1.008, estimate the percentage abundance of protium, $\text{H}$, and deuterium, $\text{H}$(or D) present in a sample of natural hydrogen. Point out any assumptions that you make. Explain why your answers are not the same as those quoted in Appendix 5.