Question

examples of radioactive elements ​

Answer 1

Answer:

Radioactive Elements

Element Most Stable Isotope Half-life of Most Stable Istope

Francium Fr-223 22 minutes

Radium Ra-226 1600 years

Actinium Ac-227 21.77 years

Thorium Th-229 7.54 x 104 yearsLong

Answer 2

periodic table↑↑↑

Radioactive Elements

Element Most Stable Isotope Half-life of Most Stable Istope

Francium Fr-223 22 minutes

Radium Ra-226 1600 years

Actinium Ac-227 21.77 years

Thorium Th-229 7.54 x 104 years

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