I A granular substance is added to a liquid. Which of the following would provide
evidence to suggest a chemical change has taken place?
The liquid gives off heat.
B
The granules dissolve completely.
C
The volume of the liquid increases.
D
The granules seem to get smaller.

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.