Question

The half-life of an element is 12 minutes. If 8g sample of the element is taken for an hour long experiment, how much of it will be left after the experiment?

Answer 1

Answer:

0.25g

Step-by-step explanation:

since half life is 12 min, the mass becomes half every 12 min

after

12 min ---4g

24min---2g

36min---1g

48min---0.5g

60min--0.25g