NOTE: You may have to look at the Nuclear Table or the Element Tables to answer some of the questions.

1) ²³⁶U fissions into molybdenum (Mo) and tin (Sn) isotopes according to

Verify that the number of protons on the left equals the number of protons on the right, and that the number of neutrons on the left equals the number of neutrons on the right.
ANSWER

2) Determine how many free neutrons are produced in the following fission process:

3) Determine the second fission fragment when ²³⁶U fissions into zirconium. If the zirconium isotope is ⁹²Zr, and the second isotope has mass number 130, how many free neutrons are produced?
ANSWER
EXPLANATION

4) ²³⁶U fissions into strontium-90 plus a second fission fragment. What is the second element? If the mass number of the second element is 141, how many free neutrons are produced? Write the equation.
ANSWER
EXPLANATION

5) Plutonium-240 fissions into strontium-90 plus a second fission fragment. What is the second element? If the mass number of the second element is 142, how many free neutrons are produced? Write the equation.
ANSWER
EXPLANATION