'For thorium-234 it's about 25 days; for thorium-232, about 14 billion years'
half-life
BY HALVES: For thorium-234 its about 25 days; for thorium-232, about 14 billion years
For thorium-234 it's about 25 days; for thorium-232, about 14 billion years
For thorium-234 it's about 25 days; for thorium-232, about 14 billion years
BY HALVES
half-life
BY HALVES