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19 Cards in this Set
- Front
- Back
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Radioactivity
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Spontaneous emission of radiation form the nucleus of an atom
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Nucleus
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The center of an atom that contains all of the positive charges and most of the mass of an atom.
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Proton
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-Positively charged subatomic particle contained within the nucleus of an atom
-Stable outside the nucleus |
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Neutron
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-Uncharged subatomic particle contained within the nucleus of an atom
-Not stable outside the nucleus |
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Isotopes
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Atoms of the same element with different mass numbers . (Same # of protons, different # of neutrons)
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Radioactive Decay
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The release of energy and sometimes particles from a nucleus
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Parent Nucleus
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A nucleus that can break down to form a nucleus of a new element
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Daughter Nucleus
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A nucleus produced when another decays
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Alpha Particle
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A Helium nucleus
4 <Atomic Mass (Neutron + Protons) 2 He /\ Atomic number (Protons) |
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Beta Particle
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An electron
0 -1 e |
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Gamma ray
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Form of radiation with no charge and no mass and the highest energy f all forms of radiation
- γ |
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Half life
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Average length of time it takes for half of the parent nuclei to decay
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Decay Series
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-When radioactive nuclei form a chain
-Always ends in a stable isotope (Its when the daughter nuclei decays producing another daughter nuclei and so on until it becomes stable) |
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Hydrogen
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-One proton, no neutrons
-Most common form of hydrogen |
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How many neutrons and protons does Deuterium contain?
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One proton, one neutron
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Tritium
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-1 proton 2 neutron
-Radioactive |
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Nuclear Fission
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-Splitting a large nucleus into 2 smaller nuclei
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Chain Reaction
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A reaction that initiates more reactions
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Nuclear Fusion
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-Fusing of 2 smaller nuclei to form one larger nucleus
-Mass of the larger nucleus is smaller then the masses of the 2 smaller nuclei added together -Lost mass is converted into energy |
