Nuclear Equations
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What happens when a nucleus emits an alpha particle?
The nucleus loses two protons and two neutrons, so: • Mass number decreases by 4 • Atomic number decreases by 2
What happens in beta-minus decay?
A neutron changes into a proton and an electron, so: • Mass number doesn’t change • Atomic number increases by 1
What happens in beta-plus decay?
A proton changes into a neutron and a positron, so: • Mass number doesn’t change • Atomic number decreases by 1
What happens when a nucleus emits a neutron?
• Mass number decreases by 1 • Atomic number stays the same
What happens to the mass and atomic numbers after a gamma ray has been emitted?
They both stay the same
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