What Is The Longest Lasting Synthetic Periodic Element?

1.	What Is The Longest Lasting Synthetic Periodic Element?
Answer» A good candidate WOULD be curium 247 (247CM), which has a half-life of 1.56 × 107 years. That's 15,600,000 years (15.6 MILLION years). A good candidate would be curium 247 (247Cm), which has a half-life of 1.56 × 107 years. That's 15,600,000 years (15.6 million years).

Answer»

A good candidate WOULD be curium 247 (247CM), which has a half-life of 1.56 × 107 years. That's 15,600,000 years (15.6 MILLION years).

A good candidate would be curium 247 (247Cm), which has a half-life of 1.56 × 107 years. That's 15,600,000 years (15.6 million years).

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