CHEMISTRY HIGH SCHOOL

Which radioisotope is used for diagnosing thyroid disorders?(1) U-238 (3) I-131
(2) Pb-206 (4) Co-60

Answers

Answer 1
Answer: The correct answer is option 3. The radioisotope used for diagnosing thyroid disorders is I-131. This isotope is used due to its low expense compared to other radioisotopes. I- 31 is a beta and gamma emitter used for the ablations of thyroid tumors.
Answer 2
Answer:

Final answer:

I-131 (Iodine-131) is the radioisotope used for diagnosing thyroid disorders. It is selectively taken up by the thyroid gland and its emissions allow for imaging of the gland.

Explanation:

The radioisotope used for diagnosing thyroid disorders is I-131 (Iodine-131). This radioisotope is used in medical procedures due to its unique characteristics. When consumed, it is selectively taken up by the thyroid gland. I-131 emits beta particles and gamma radiation which allows for imaging of the thyroid gland. This in turn helps health professionals diagnose if the thyroid is functioning normally or if disorders such as hyperthyroidism or tumors are present.

Learn more about I-131 Radioisotope here:

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What is the chemical symbol for gold?

Answers

The chemical symbol for gold is AU

Answer:

au

Explanation:

on the periodic table golds chmeical symbol is au

Make the following conversion.

60.2 mg = _____ g

Answers

Answer:

60.2 mg is equal to 0.0602 g.

Explanation:

Given = 60.2 mg

To find : 60.2 mg = ? g

Solution:

We know that in 1 gram there are 1000 milligrams.

1 g = 1000 mg

Then in , 1 mg = 0.001 g

So, 60.2 mg = 60.2 mg 0.001 g=0.0602 g
the question is 0.0602

What's the process results in a splitting of a nucleus ?

Answers

Nuclear fission is the answer.
 i believe it is nuclear fission 

Based on the Periodic Table, explain why Na and Khave similar chemical properties

Answers

The Group 1 elements, which include lithium (Li), sodium (Na) and potassium (K) are also known as the alkali metals. They all have one electron in the outer shell and so they have similar properties.

A researcher is using a particle accelerator in an experiment studying isotopes. How can the researcher change one isotope into a different isotope of the same element?by removing valence electrons

by adding valence electrons

by adding or removing protons

by adding or removing neutrons

Answers

The researcher can change one isotope into a different isotope of the same element by adding or removing neutrons. This is because, isotopes are two or more forms of an element which contain equal number of protons and electrons but different number of neutrons. Isotopes differ in relative atomic mass but have same chemical properties.

Answer: by adding or removing neutrons

Explanation:

Which of the following materials is useful for making molds because it has a low melting point?A. wood
B. metal
C. clay
D. wax

Answers

Molds are created to achieve aspecific design of a material. These materials either came from a process ofhaving a higher or lower temperature. Therefore, the molder must have thermalresistant properties. Low melting points means that the material to be shapedcame from a cooler process. Wood and metal have higher thermal conductivity andtherefore can easily be cooled. The wax can turn really hard and can beunbreakable when present in colder materials due to the lipids present in it. Clayhowever can become a mold because of its low melting point.

The right answer is wax.

The waxes are of synthetic, natural, animal or plant origin composed of long and branched chains which gives them a microcrystalline structure. This results in a soft, white, non-translucent substance whose melting temperature is arround 70 ° C.

The melt temperature of the clay exceeds 1000 ° C.

It is clear that wood and metal are not used for low temperature molding.
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