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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.

Sodium - 24.

Phosphorus - 32.

Which of the following is a precaution when handling radioactive materials?

Breathing near the source.

Eating near the source.

Wearing lead aprons and gloves.

Touching with bare hands.

The neutron to proton ratio for ¹³¹₅₄I

77:131.

131:54.

54:77.

77:54.

Which particle is the heaviest among common radioactive emissions?

Gamma ray.

Neutrino.

Beta particle.

Alpha particle.

Which of these radiations can travel several meters in air?

None.

Alpha.

Gamma.

Beta.