Which of the following statements about subatomic particles best characterizes neutrons? a-positive charge, heavy, found in the nucleus b-no charge, heavy, found in the nucleus c-negative charge, light, circling the nucleus d-positive charge, heavy, circling the nucleus

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.

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2:

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.