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5/39 MCQs for:

Radioactivity

Which of the following radioisotopes is used to monitor the functioning of the thyroid gland?

Carbon - 14.

Iodine - 131.

Phosphorus - 32.

Sodium - 24.

Radioactive decay results in:

Transformation of one element to another.

Color change.

Stable isotopes only.

Increase in atomic number always.

Which of these radiations can travel several meters in air?

Alpha.

Gamma.

Beta.

None.

What is a Geiger-Müller counter used for?

Detecting sound waves.

Measuring blood pressure.

Detecting and measuring radiation.

Measuring pressure.

A common natural source of radiation is:

MRI.

X-ray machines.

Cosmic rays.

Microwaves.