What is the percent error for a mass measure ment of 17 g , given that the correct value is 20.3 g ? Answer in units of %.

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Geothermal energy for industrial use is available almost anywhere. a.true b.false

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.