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chapter 7 radiation

B.C. science 10

Alpha particle a positively charged atomic particle that is much more massive than either a beta or gamma radiation
beta particle high speed negatively charged electron emmited by a radioactive nucleus in beta decay
gamma particle rays of high energy, short wave radiation emitted from nuclei of atoms
isotopes different atoms of a particular element that have the same number of protons but different number of neutrons ( different atomic mass )
light one form of radiation that is visible to humans
mass number the total number of protons and neutrons found in the nucleus of a atom
radiation as high energy rays and particles emitted by radioactive sources
radioactivity release of high energy particles and rays of energy from a substance as a result of changes in the nuclei
proton a sub-atomic particle that has a positive electric charge ( 1+ )
neutron a sub-atomic particle that does not have a electric charge
electron a sub-atomic particle that has a negative electric charge ( 1- )
nucleus the mass of the atom made up of protons ( 1+ ) neutrons ( neutral )
radioactive source a source of radiation
Ernest Rutherford A canadian chemist who received a nobel prize for research into chemistry into radioactive substances.
Alpha decay emission of a alpha particle ( 1- ) from a nucleus
beta decay a neutron changes into a proton ( 1+ ) that stays in the nucleus, and a electron ( 1- ) that shoots out from the neucleus with lots of engergy
gamma decay results from a redistribution of energy within the nucleus giving off a high energy gamma ray as the isotope falls from a high energy state to a low energy state
nuclear equation a set of symbols that indicates changes in the nuclei of atoms during a nuclear reaction
Radio isotopes natural or man-made isotopes that decay into other isotopes relasing radiation
Created by: gwright6