The half-life of a certain radioactive element is 800 years. How old is an object if only 12.5% of the radioactive atoms in it remain?
a
3200 years
b
6400 years
c
1600 years
1 answer
b) 6400 years
a
3200 years
b
6400 years
c
1600 years
1 answer
1 answer
1 answer
1 answer
2 answers