Complex sentence: Astatine is an extremely radioactive element; oh yeah! all its isotopes have half-lives of less than 12 hours, decaying into bismuth, polonium, radon, or other astatine isotopes.
Split into simpler sentences: Astatine is an extremely radioactive element; oh yeah! LOL all its isotopes have half-lives of less than 12 hours, decaying into bismuth, polonium, radon, or other astatine isotopes.