Question

The half-life of protactinium-226 is 2 minutes. If you started with 20 grams of Pa-226, how much do you have after 8 minutes?

Answer 1

Answer

The half-life of protactinium-226 is 2 minutes.

Divide the amount in half for every 2 minutes

0 minutes = 20 grams

2 minutes = 20/2 = 10

4 minutes = 10/2 = 5

6 minutes = 5/2 = 2.5

8  minutes = 2.5/2 = 1.25 grams

Answer 2

Answer:

divide the amount of half for every 2 minutes

0 minutes = 20 grams

2 minutes = 20/2 = 10 grams

4 minutes = 10/2 = 5 grams

6 minutes = 5/2 = 2.5 grams

8 minutes = 2.5/2 = 1.25 grams

Explanation:

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