Which of the following best describes the half life of uranium-235?

Question

Accepted Answer

Starting at 100%, after 704 million years 50% will be left, after another 704 million years 25% would be left.

Answer

Starting at 100%, after 704 million years 50% will be left, after another 704 million years nothing will be left.

Answer

Starting at 100%, after 5730 years 50% will be left, after another 5730 years nothing will be left.

Answer

Starting at 100%, after 5730 years 50% will be left, after another 5730 years 25% would be left.

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