How much of a radioactive actinium in grams will be left after 18 hours if the half-life is 6 hours and you start with 384 grams?

How much of a radioactive actinium in grams will be left after 18 hours if the half-life is 6 hours and you start with 384 grams?

1 Expert Answer Because the half-life is 6 hours, the starting amount will be halved every 6 hours. Because there are 18 total hours, the starting amount will be divided by 2 (halved) three times. You will then have 1/6 of the starting amount, thus being 384 grams/ 6 = 48 grams.

How long does I-131 stay in your system?

How long does radioiodine stay in your body? The radioiodine from your treatment will remain in your body temporarily. Most of the radioiodine not collected by your residual thyroid tissue will be eliminated during the first two days after your treatment.

How will I feel after radioactive iodine?

What To Expect After Treatment. Most people don’t feel different after treatment. But a few people may have nausea. Within a few days after treatment, the radioactive iodine will leave your body in your urine and saliva.

Why is iodine 131 used?

I-131 is used in medicine to diagnose and treat cancers of the thyroid gland. Where does it come from? I-131 is produced commercially for medical and industrial uses through nuclear fission. It also is a byproduct of nuclear fission processes in nuclear reactors and weapons testing.

Why is iodine 123 better than iodine 131?

Use of 123 I has several advantages over 131 I, including a shorter half-life (13.3 hours vs. 8 days), lack of beta emission, and better image quality.

How does iodine-123 behave in the body?

Like 131I, its biochemical behavior is identical to that of stable iodine. Iodine-123 decays by electron capture, with a photon energy of 159 keV and a half-life of 13 hours. The gamma emission of 123I allows excellent imaging (≈80% efficiency for a ½-inch-thick crystal) with low background activity.

How does iodine-123 enter the body?

Sodium Iodide I-123 is a radioactive isotope of iodine used in nuclear medicine for the diagnostic study of thyroid disease. Following oral administration, I-123 is absorbed through the gastrointestinal tract and is taken up by the thyroid gland.

Is Iodine-123 toxic?

Large doses of Iodine-123 maybe toxic to the thyroid gland and surrounding tissues. Iodine-123 may cause hypothyroidism and other thyroid disfunctions, including thyroid cancers.

What is the function of iodine-123?

Iodide I-123 (as sodium Iodide I-123) is a radioactive isotope of iodine used in nuclear medicine for the diagnostic study of thyroid disease. Following oral administration, I-123 is absorbed through the gastrointestinal tract and is taken up by the thyroid gland.

What type of radiation is emitted by Iodine-123?

gamma radiation

How is iodine 131 the same as iodine 126?

Iodine 131 and iodine 126 are the same in the sense that, they both have the same number of electrons and protons in their atoms, it is only the number of their neutrons that is different. Iodine 131 has 78 neutrons while iodine 126 has 73 neutrons.

Is Iodine 126 stable?

Unsourced material may be challenged and removed. There are 37 known isotopes of iodine (53I) from 108I to 144I; all undergo radioactive decay except 127I, which is stable. These are 123I, 124I, 125I, and 131I.

Is Iodine 131 man made or natural?

Iodine-131 is an artificially produced fission by-product resulting from nuclear weapons, above-ground nuclear testing, and nuclear reactor operations.

Which field is the iodine most useful?

Radioactive iodine has been used successfully for the treatment of cancer of the thyroid. The radioactive isotope iodine-123 is considered the agent of choice for brain, thyroid, and renal imaging and uptake measurements.

Is iodine stable or unstable?

Iodine is a metal found throughout the environment in a stable form, iodine-127, and as unstable radioactive isotopes of iodine. These radioactive forms include iodine-129 and iodine- 131. Iodine-129 is produced naturally in the upper atmosphere.

Where do you stay after radioactive iodine treatment?

To decrease the radiation dose to others:

1. You should sleep in a separate bed.
2. Remain in your home for the first four days.
3. Do not hold young children or spend much time near a pregnant woman.
4. Family members should stay about six feet or more from you.

Can I use my cell phone after radioactive iodine?

You will have to stay in your room for at least 1 to 2 hours after your treatment. You can use your cell phone or watch TV to help pass the time. You won’t be able to have visitors during this time. You may not have any side effects from the treatment right after you get it, but you may have side effects later.

How much water should I drink after radioactive iodine?

Clearing the radioactive iodine from your body Follow these guidelines to help the radioactive iodine leave your body quickly. Drink lots of liquids. Starting right after your treatment, try to drink at least 1 cup of low-iodine liquid every hour while you’re awake. Keep doing this for 2 to 3 days after your treatment.

When can I return to work after radioactive iodine?

In other cases, patients who work closely with others or with children, or those who are not tolerating the hypothyroidism well may decide to start work days or several weeks after treatment. 3. When can I resume my normal diet? You can resume a normal diet 2 days after your RAI treatment.