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21 Cards in this Set
- Front
- Back
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Nucleons are particles occupying the ______
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nucleus
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Nucleons consist of _______ charged __________ and ______ _______
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Positive; protons; neutral neutrons
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Nucleons have almost 2000 times the _________ of __________
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Mass; electrons
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Nucleons are made up of ________ and ____________
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quarks; leptons
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Mass number is also considered letter ______ and can be calculated by adding _______ and ______
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A; protons and neutrons
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Atomic number is also considered letter _____ and is equal to the number of _______ and ______
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Z; protons and charge
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Isotopes are atoms of _______ element with different numbers of _____ (different _________)
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same; neutrons; masses
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Strong forces are forces of __________ between nucleons
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attraction
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Strong are independent of the _________ of the nucleon
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charge
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Strong forces are ______ range (exists only between ______ ________)
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short`; closest neighbors
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Electrical forces are forces of ______ between ___ charged protons
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repulsion; positive
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Electrical forces are _____ range
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long
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If the atomic number is over ____ then it is radioactive
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82
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What makes nuclei unstable?
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When electrical forces of protons are greater than strong forces of nucleons
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If a isotope is radioactive then it spontaneously emits a ______ and _____ into another _________
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particle; decays; element
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What is another word for changing into another element through radioactive decay?
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Transmutation
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What are 3 common radioactive emissions?
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Alpha, beta, gamma
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What can alpha particles be stopped by?
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Paper
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What can beta particles be stopped by?
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Aluminum
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What can gamma particles be stopped by?
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Led
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What can gamma particles pass through paper but not led?
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Because Led is more dense than paper
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