A 50 gram sample of a radioisotope undergoes 2 half-lives. How many grams

would remain at the end? Explain.

At the end of second half life 12.5 g will left

Explanation:

Given dа ta:

Total Mass = 50 g

Half lives = 2

Mass remain at the end = ?

Solution:

At time zero = 50 g

At 1st half life = 50 g / 2 = 25 g

At second half life = 25 g/2 = 12.5 g

So at the end of second half life 12.5 g will left.