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chapter 7 radiation
B.C. science 10
Question | Answer |
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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 |