Why does an ionic compound conduct an electric current when the compound is melted but not when it is in the solid state?

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.

What volume would 2.25 moles of ne has occupy at stp?

Which is the most concentratic acid