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Which of the following is radioactive in nature?

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in Chemistry – Class 12 by (188k points)
Which of the following is radioactive in nature?

(a) Oxygen

(b) Sulphur

(c) Tellurium

(d) Polonium

This question was posed to me during an online exam.

This question is from P-Block in section P-Block Elements of Chemistry – Class 12

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Best answer
The correct answer is (d) Polonium

Explanation: Oxygen is the most non-metallic element of group 16. Sulphur is also a typical non-metal and Tellurium is a metalloid. Polonium is, however, metallic in nature but is radioactive with a short half-life (13.8 days).

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