Question

If 220 g of a substance decays to 70 g in 28 000 years, the

half life of this substance is closest to:
a) 17000 years
b) 19000 years
c) 21000 years
d) 23000 years

Answer 1

Hello!

If 220 g of a substance decays to 70 g in 28 000 years, the half life of this substance is closest to:

b) 19000 years