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phys. sci. quiz c6

physical science quiz chapter 6

QuestionAnswer
( ) is a condition in which an ( ) ( ) of an atom breaks down radioactivity, unstable nucleus
( ) gives off ( ) ( ) radioactivity, much, energy
( ) can make one ( ) turn into another ( ) radioactivity, element, element
the particles and/or energy given off by an unstable nucleous radiation
alpha particle has what 3 things 1.symbol is He2.charge is +23.can be stopped by paper
beta particle has what 3 things 1.symbol is e2.charge is -1c.can be stopped by thick wood or metal
gamma ray has what 3 things 1.symbol is (latin y) y2.charge is zero3.not easily stopped!!!
all particles can be ( ) harmful
when a high energy neutron is released by an unstable nucleus neutron emission
since the ( ) breaks down, ( ) change into other elements ...this is an example of ( ) ( ) nucleus, elements, nuclear decay
we cant just balance ( ) the same way we did before equations
we have to use ( ) ( ) isotope notations
all ( ) substances break down in their ( ) or they decay radioactive, nucleus
each radioactive substance has its own ( ) or ( ) of decay speed, rate
the amount of time it takes for a radioactive material to decay half-life
a force in nature that holds protons and neutrons together in a nucleus strong nuclear force
what can make a nucleus unstable? having to many or too few neutrons or having over 83 protons
when charges that are the same repel eachother electric repulsion
2 protons, both positive, will ( ) each other repel
the process in which a nucleus splits into 2 or more smaller gragments nuclear fission
this releases ( ) and much ( ) particles, energy
the amount of energy is ( ) is related to the amount of ( ) given of. released, matter
the equation E=mc^2 describes.... energy=mass multiplies by the speed of light squared
Created by: darrl
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