# Question #bf230

##### 1 Answer

May 29, 2017

#### Answer:

Pu-239 has a half life of 24100 years.

#### Explanation:

Decay reaction:

First let me compute r (decay coefficient) for Pu-239.

Now you can compute what amount of Pu-239 will be after 6500 years.

Your answer is 8.295 grams.

Reference:

Half-life of Plutonium 239. Retrieved on the internet May 29, 2017. hypertextbook(dot)com(slash)facts(slash)1999(slash)JaniceChing(dot)shtml