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-Nuclear stability
-radioactive decay
-fission and fusion
-Nucleus is very stable
-strong forces and weak forces
-strong hold protons together(only works when close together)
-repulsive force causes nucleus to become unstable
-neutrons keep protons from feeling the repulsive force so the nucleus does not fall apart
-unstable nucleus=radioactive nucleus
-wrong neutron/proton ratio
---------too high or too low
-right ratio from the zone of stability(ends at > 83 then it becomes radioactive and unstable)
-if not in red on graph its unstable and radioactive
-atoms goal is to become stable
-alpha decay or alpha emission(to give off)
^4 2He
2=nuclear charge
4=mass # p+n
He=element
^240 94Pu = ^4 2 He + ^236 92U
-Beta decay (lose a neutron gain a proton)
-Beta emission
^0 -1e
down and to the right on zone of stability graph
^228 88Ra = ^0 -1e + ^228 89Ac
neutron to proton
^1 0n = ^1 1H + 0^-1e
-Positron emission (positive electron)
B^+
^0 1e
-lose a proton and gain a neutron
e^- capture
^0 -1e
-end result same as positron emission lose a proton gain a neutron
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