Question

How much of a radioactive kind of nitrogen will be left after 30 minutes if you start with 1,920 grams and the half-life is 10 minutes?
grams

Answer 1

After 30 minutes, there will be 120 grams of radioactive nitrogen left.

Calculating the remaining amount of radioactive nitrogen after each half-life:
- After 10 minutes: 960 grams remaining (half of 1,920 grams)
- After 20 minutes: 480 grams remaining (half of 960 grams)
- After 30 minutes: 240 grams remaining (half of 480 grams)
- After 40 minutes: 120 grams remaining (half of 240 grams)

Therefore, after 30 minutes, there will be 120 grams of radioactive nitrogen left.