CEM 141 Lecture 23: CEM 141 10/24 Lecture 23 (Chapter 3: Nuclear reactions, bonding)
Document Summary
Fusion releases 10 million times more energy per mole than combustion. Because we can"t get as much energy back as we use to start the fusion. Due to nuclear fusion process, the total number of atoms in the stars are decreasing. Nuclear fission is the fragmentation of heavy nuclei to form lighter, more stable ones + energy! (fission produces energy) Neutrons released in the fission of 235u can induce three more fissions, then nine, and so on leading to a chain reaction. Critical mass is the mass required for the chain reaction to become self-sustaining. Nucleus emits or captures particles or energy in the form of electromagnetic radiation. Beta particle (electron) emission (cid:533) or 0 1e or e+ Ex. can"t find the melting point of a single atom. Isolated atoms/molecules don"t exist in a state (solid, liquid or gas) Isolated atoms or molecules don"t have melting points or boiling points.
