Help with Nuclear energy/weapons?

I. Correct

II. Radioactive decay is the spontaneous breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus. Remember that a radioisotope has unstable nuclei that does not have enough binding energy to hold the nucleus together. Radioisotopes would like to be stable isotopes so they are constantly changing to try and stabilize. In the process, they will release energy and matter from their nucleus and often transform into a new element. This process, called transmutation, is the change of one element into another as a result of changes within the nucleus. The radioactive decay and transmutation process will continue until a new element is formed that has a stable nucleus and is not radioactive. Transmutation can occur naturally or by artificial means.

III. No idea, sorry

IV. They cause a chain reaction which produces a high amount of energy in a very short span of time, causing a massive explosion.

V. (in′düst ′fish·ən)

(nuclear physics) Fission which takes place only when a nucleus is bombarded with neutrons, gamma rays, or other carriers of energy.

Binding Energy the energy that holds a nucleus together. This is equal to the mass defect of the nucleus.

Critical Mass the minimum amount of fissile material needed to maintain a nuclear chain reaction.

VI : Hydrogen bombs use the process of nuclear fusion -- or fusing instead of splitting nuclei -- to create enormous amounts of heat and radiation explosively. The process of fusion requires that hydrogen isotopes be squeezed together under high temperatures and pressures to fuse into helium, which releases heat, neutrons and energy.

III it is observed that if a neutron hits a nucleus it can sometimes cause that nucleus to fission itself.

the density or closeness of the atoms of U 235 or PU change the probability of that happening

in an "A-Bomb" a chemical explosive shell "squeezes" the material form "safe" slow radioactivity to exponential increase in rates in tiny fractions of a micro sec. that technology was the big secret in the A-Bomb. An "atomic power plant " tries to control the rate so the core gets hot but does not explode

it is "dancing with the Devil" when anything goes wrong it gets so hot everything melts, expands and keeps from exploding like a bomb.

the "fissile" material in the first bombs was about the size of a golf ball but only a mass Of Uranium smaller than fraction of a dime actually went E= MC^2 the whole bomb assembly weighed several tons.