A 56 mgmg sample of a radioactive nuclide is administered to a patient to obtain an image of her thyroid. If the nuclide has a half-life of 12 hours, how much of the nuclide remains in the patient after 5.0 days?Express your answer using two significant figures. Radioactive Nuclide Half-Lives and Health Effects

Radioactive nuclide half-lives and health effects
Medical imaging uses radioactive nuclides to monitor and diagnose diseases. Particularly, radioactive nuclear nuclides are used for creating images of thyroid glands, an important component of the endocrine process. Half-life is the time taken for half the original amount of the nuclide (radioactive nuclides) to decompose. In the case of a nuclide with a 12-hour half-life, after 5.0 days, only one-eighth (1/8) of the original amount of the nuclide would remain in the patient (McIver & Hay, 2018). Radiation exposure and any possible health consequences are highly affected by the nuclide and its duration. The American Thyroid Association (2017, American Thyroid Association) states that iodine131 is a good diagnostic imaging agent and has low long-term risks of cancer. However, the use of iodine-131 in therapy to treat thyroid cancer can lead to an increased risk of secondary cancers (McIver & Hay, 2018). Cont…
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