Uranium-235 Releases an Average of 2

question 82

Multiple Choice

Uranium-235 releases an average of 2.5 neutrons per fission,while plutonium-239 releases an average of 2.7 neutrons per fission.Which of these elements might you therefore expect to have the smaller critical mass?

• A)plutonium-239
• B)uranium-235
• C)The number of neutrons per fission will not effect the size of critical mass.
• D)The critical mass of these elements cannot be determined from only the number of neutrons per fission.

---

Definitions:

Renewable Natural Resource

is a resource that can replenish itself naturally over time, such as sunlight, wind, rain, tides, and biomass.

Solar Power

Energy from the sun that is converted into thermal or electrical energy for use by humans.

Natural Gas

A fossil fuel consisting mainly of methane, used as a source of energy for heating, cooking, and electricity generation.

Ethanol

A volatile, flammable, colorless liquid commonly used as a biofuel and as the principal type of alcohol found in alcoholic beverages.