1. 
   

You are a radiation expert for the state of Colorado when you receive notification of an overturned semi carrying radioactive waste. Out of the twenty containers the truck was carrying, ten ruptured, exposing the local community of approximately 300,000 residents to potentially lethal radiation. You quickly manage the situation with the local HAZMAT team evacuating the residents and diverting all traffic around the spill and away from harm.

You find the manifest and notice the truck was carrying spent nuclear fuel consisting of depleted uranium and plutonium. You communicate this to the chief HAZMAT officer who asks the following question:

If uranium-238 has a half-life of 4.13 x 10⁹years, how many millennium (1000 years) will it take for 8 grams of depleted uranium to be depleted by 0.3 of its original mass?

(Round to the nearest whole number)

1. Plutonium-239 has a half-life of approx. 24,118 years. Assuming we started with 23 grams, how many grams of plutonium would there still be after 42,411 years?

(Round your answer to two decimal points)

1. Uranium-238 undergoes radioactive decay until a stable isotope is reached. One of the steps is shown below. The chief would like to know what new elements are being produced. Determine the atomic mass, atomic number, and symbol of the new element based on the equation below.

(219)/(85)At ->?+(0)/(-1)beta

1. Uranium-238 undergoes radioactive decay until a stable isotope is reached. One of the steps is shown below. The chief would like to know what new elements are being produced. Determine the atomic mass, atomic number, and symbol of the new element based on the equation below.

Pb->?+(4)/(2)alpha