Question

which substance is highly radioactive and rare ??
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Answer 1

Answer:

Polonium is a radioactive element. Polonium (Po) is a very rare and highly volatile radioactive metal. Before Polish-French physicist Marie Curie's discovery of polonium in 1898, uranium and thorium were the only known radioactive elements.

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Answer 2

Answer:

Polonium

Polonium is a radioactive element. Polonium (Po) is a very rare and highly volatile radioactive metal. Before Polish-French physicist Marie Curie's discovery of polonium in 1898, uranium and thorium were the only known radioactive elements.

Explanation:

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