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Radioactivity VII

Study stack for You be the Chemist challenge

An Italian physicist most noted for his work on beta decay, for the development of the first nuclear reactor, and for his contributions to the development of quantum theory. He worked on the Manhattan Project during WWII to produce the atomic bomb. Enrico Fermi
Atomic #94- Is a very heavy, silvery element; found in minute amounts in uranium ore. A rare radioactive element. Used mainly as fel for nuclear reactor and nuclear bombs. PU Plutonium
Changes that occur in the structure of atomic nuclei. The energy that result is called nuclear energy or atomic enery. It is released in two different ways: Nuclear fission and nuclear fusion. Nuclear Reactions
Nuclear Fission A nuclear reaction that occurs when an atomic nucleus splits into two smaller parts (nuclei), usually about the same size. When this happens, energy is released.
Hydrogen bombs use...Fusion or Fission? Nuclear Fusion.
Nuclear Fusion Nuclear Fusion only occurs under very hot conditions. The sun and all other stars create heat and light through nuclear fusion.
What is Half-Life? Is the time it takes for one-half of the nuclei present in a sample to undergo radioactive decay.
Radioisotopes? Atoms that are radioactive.
Carbon 12 THe most common form of carbon. It was adopted in 1961 as the standard for defining all atomic weights.
Carbon 13 A non-radioactive and is frequently used for isotopic labeling studies. These studies follow how a carbon atom goes through specific reactions.
What is Radioactivity? Is the spontaneous breakdown of an unstable nucleus in an atom that involves the release of energy in the form of electromagnetic radiation or particles.
Henri Becquerel: a French physicist Henri Becquerel accidently discovered radioactivity. He was actually investigation phosphorescence in uranium salts.
Marie Curie Discovered that the substance thorium was radioactive a term she created. Curis along with her husband discoverd the radioactive elements polonium and radium.
Polonium #84 A rare element discovered by Maria and Pierre Curie in 1898. It is named after the country Poland where Marie Curie was born. Is mainly used as a source of neutrons generally by combining it with beryllium. Helps eliminate static electricity.
Radon #86 Is a radioactive; the isotope with the longest half-life is radon-222 with a half life of only four days. Is a colorless radioactive gas at a normal room temperature of about 70-75F Glows with yellow color when cooled to its solid state.
Radium #88 Highly reactive metal. Is a brillant, white metal in pure form but blackens when exposed to air. Occurs naturally in the enviroment from the decay of uranium and thorium. Its most stable isotope, radium 226 has a half-life of 1600 years.
Alpha (a) Radiation (Alpha Particles) Radiation composed of helium 4 nuclei (having a nucleus that is the same as helium with two protons and two neutrons.
Radiation that travels very sloly and only a very short distance through air. It cannot penetrate skin or even a thin sheet of paper. Alpha particles are not radioactive. After losing their energy, they attract two electrons to become a helium atom. Alpha Particles (Alpha Radiation)
Beta Radiation (Beta Particles) Radiation composed of electrons, emitted from an unstable nucleus, that are in high velocity.
Johannes Wilhelm Geiger A German physicist known for his work on radioactivity. In 1928 he deeloped a device to measure radioactive emissions. The device is known as the Geiger Counter.
Radioactive Decay The spontaneous breakdown of an unstable atomic nucleus.
92 and above are _____ made elements Man
Created by: bragabit



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