Question

HELP NOW I MEAN NOW PLEASE

Pieces of uranium-232 are discovered in a cave. If its half-life is 70 years, how many years will it take a 10 g piece of uranium-232 to be reduced to 2.50 g?
A.
70 years
B.
210 years
C.
140 years
D.
280 years

Answer 1

C. 140 years

Step-by-step explanation:

Undergoing decay to decrease by half.