What does the following statement imply? "Thorium-232, a radioactive metal used in manufacturing lenses for scientific instruments, has a half-life of 1.4×10¹⁰ years."

• A. 50.0% of a given sample of Thorium-232 will decay after 1.4×10¹⁰ years since its half-life is 1.4×10¹⁰ years.
• B. 100% of a given sample of Thorium-232 will decay after 1.4×10¹⁰ years since its half-life is 1.4×10¹⁰ years.
• C. 10.0% of a given sample of Thorium-232 will decay after 1.4×10¹⁰ years since its half-life is 1.4×10¹⁰ years.
• D. 25.0% of a given sample of Thorium-232 will decay after 1.4×10¹⁰ years since its half-life is 1.4×10¹⁰ years.

Answer: (A)