At which stage(s) in meiosis is dna condensed into chromosomes? prophase i only, prophase i and ii, metaphase i and ii, metaphase ii only

What happens to isotopes that are unstable?

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.

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released