An isotope of the element Thallium TI-206, undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium isotope what mass of the isotope will be left after 9.3 minutes have elapsed?The post An isotope of the element Thallium TI-206, undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium… first appeared on Nursing School Essays.