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18 Cards in this Set
- Front
- Back
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Radioactivity
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nuclear decay
all elements with 83 protons are radioactive |
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true
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All elements with 92 protons dont exist naturally on earth.
true or false? |
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True
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The closer the ratio of protons to neutrons the more stable the element. true or false?
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True
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Around 1 to 1.5 protons to neutrons , the atom becomes unstable. True or flase?
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Strong force
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holds the protons and neutrons in the nucleus of an atom together.
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distance created by the neutrons
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strong force depends on?
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the more neutrons there arre the weaker the force.
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how does the force get weaker?
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Electric Force
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Pushes the protons apart
just like charges repel |
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Nuclear decay
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Three types of nuclear radiation
- alpha -beta -gamma rays |
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Alpha particles
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least penetrating type of radiation
(can be stopped by a sheet of paper.) 2 protons and 2 neutrons Atomic mass of 4 and charge of 2 |
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Beta paticles
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greater penatration than alpha but less than gamma
verry little mass and charge A neutron decays/ changes into a proton and an electroon is given of from the nucleus. |
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Gamma Rays
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the most penetrating type of radiation
- have no mass and no charge causes less damage to living tissue usually released with alpha or beta particles |
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Transmutation
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the process of changing one element to another through nuclear decay.
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Radioactive Half life
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The time it takes for 1/2 the nuclei in a sample the isotope to decay.
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Nuclear fission
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the process of splitting a nucleus into 2 nuclei with smaller masses
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Nuclear Fussion
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two nuclei with low masses are combined to form one nucleus of a larger mass
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Nuclear fission
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causes a chain reaction
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nucleaer fusion
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isint a chain reaction.
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