Which of the following substances will form a crystal lattice?
A) CH4 B) NaF C) NH3D) H2E) H2O

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Identify a specific example for each type of technology

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.