Question

What fraction of tritium will remain after 25 years?

Answer 1

Tritium is 12.5 y initially 50 percent decayed in those years.....
hope it will help!!!@momoko.

Answer 2

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}$.

• ❤.. By defination of half-life , half of the initial sample will ramain undecayed after 12.5y .
• ❤. In the text 12.5 y, one- half of these unclei would have decayed.
• ❤. Hence, one fourth of the sample of tge initial pure tritium will remain undecayed.