Question

how long does it take u to turn into th? *
3 billion years
24 days
4.5 miuntes
24 minutes
4.5 days
24 billion years
3 days
4.5 billion years
3 minutes
how long does it take po to turn into pb? *

Explanation:

Uranium - 238 decays to Thorium - 234 with a half - life of about 4.5 billion years through alpha decay.

Answer:

4.5 billion years