What is iodine?

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the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay

a chemical element with the symbol I and atomic number 53

an unstable isotope of lead that decays by emitting radiation

the most common isotope of uranium found in nature, with a relative abundance of 99%

a very rare radioactive isotope; before Marie Curie's discovery of polonium in 1898, uranium and thorium were the only known radioactive elements

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What is polonium-210?

Choose 1 answer

a chemical element with the symbol I and atomic number 53

the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay

the most common isotope of uranium found in nature, with a relative abundance of 99%

an unstable isotope of lead that decays by emitting radiation

a very rare radioactive isotope; before Marie Curie's discovery of polonium in 1898, uranium and thorium were the only known radioactive elements

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What is lead-205?

Choose 1 answer

the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay

a chemical element with the symbol I and atomic number 53

a very rare radioactive isotope; before Marie Curie's discovery of polonium in 1898, uranium and thorium were the only known radioactive elements

an unstable isotope of lead that decays by emitting radiation

the most common isotope of uranium found in nature, with a relative abundance of 99%

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What is bismuth-209?

Choose 1 answer

a chemical element with the symbol I and atomic number 53

an unstable isotope of lead that decays by emitting radiation

the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay

the most common isotope of uranium found in nature, with a relative abundance of 99%

a very rare radioactive isotope; before Marie Curie's discovery of polonium in 1898, uranium and thorium were the only known radioactive elements

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What is uranium-238?

Choose 1 answer

the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay

the most common isotope of uranium found in nature, with a relative abundance of 99%

a very rare radioactive isotope; before Marie Curie's discovery of polonium in 1898, uranium and thorium were the only known radioactive elements

an unstable isotope of lead that decays by emitting radiation

a chemical element with the symbol I and atomic number 53

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